Welcome User!
Sign In
Join Free
Sales :
+91-9953717914
|
Support :
+91-9700318318
For Buyer
Post Buy Requirement
Browse Suppliers
Manufacturers Directory
Country Suppliers
Buyer FAQ
For Seller
Sell Your Product
Latest Buyleads
Seller FAQ
Help
Send Feedback
Advertise with us
Contact Us
Sales
:
+91-9953717914
Support
:
+91-9700318318
Exporters India
Products / Services
Products / Services
Companies
Buy Leads
Search
Post Buy Requirement
Home
>
Voltage Stabilizers & Power Controllers
>
Voltage Stabilizer
>
Voltage Stabilizer in Surat
Voltage Stabilizer in Surat
(
81
Products Available )
Grid View
List View
Location
Near Me
All India
Surat
Ankleshwar
Vapi
Bhavnagar
Vadodara
Anand
Related Category
Digital Voltage Stabilizer
AC Voltage Stabilizer
Oil Cooled Voltage Stabilizer
Voltage Controllers
Static Voltage Stabilizer
Industrial Voltage Stabilizer
Voltage Corrector
Static Voltage Regulator
Industrial Stabilizers
Business Type
Manufacturer
Exporter
Wholesaler
Retailer
To List your Product
Boost Your Business Visibility Worldwide
Register Now
Explore by Products
Servo Stabilizer
in Surat
Automatic Voltage Regulator
in Surat
Automatic Voltage Stabilizer
in Surat
Stabilizers
in Surat
Automatic Voltage Regulator Power Source:Electric
₹ 12,500
/ Piece
Country of Origin :
380 V max
Frequency :
50 Hz
Power :
3 HP
Power Source :
Electric
Efficiency :
98.00%
Phase :
Single Phase
More details...
PE
POWERCARE ENGINEERS
Udhna, Surat, Gujarat
Verified
Platinum
12 Years
4.4
/5
(16)
Single Phase Digital Servo Voltage Stabilizer
₹ 60,000
/ Piece
Power :
10 KVA
Material :
Iron
IP Rating :
IP55
Number Of Flower :
Automatic
Automation Grade :
Semi-Automatic
Output Voltage :
240
Input Voltage :
240 V
Brand Name :
PION
Power Source :
Electric
Frequency (Hz) :
50 Hz
More details...
N. J. International
Gopipura, Surat, Gujarat
Verified
10 Years
+3
50hz Servo Voltage Stabilizer, Certification : CE Certified, ISO 9001:2008
Get Price Quote
Condition :
New
Supply Type :
Manufacturer
Frequency :
50hz
Feature :
Auto Cut, Easy Operate, Shocked Proof, Stable Performance, Works In Low Voltage
Output Type :
AC Single Phase, AC Three Phase
Phase :
1 & 3 Phase
Certification :
CE Certified, ISO 9001:2008
Automatic Grade :
Automatic
Country of Origin :
India
Brand Name :
Aenerrgy
More details...
Ajay Enterprises
Sachin, Surat, Gujarat
Verified
11 Years
4.3
/5
(6)
servo voltage stabilizer
Get Best Deal
Get Quote
Krykard Voltage Stabilizers
Get Best Deal
Get Quote
220V Automatic 5-10kw 50hz Krykard Voltage Stabilizers, For Stabilization, Feature : Auto Cut
Get Price Quote
Application :
Stabilization
Condition :
New
Number Of Flower :
Voltage Stabilizer
Output Type :
AC Single Phase, AC Three Phase
Brand Name :
Aenerrgy
Feature :
Auto Cut
Supply Type :
Manufacturer
Frequency :
50hz, 60hz
Country of Origin :
220V, 440V
Power :
5-10kw
More details...
AE
Ajay Enterprises
Sachin, Surat, Gujarat
Verified
11 Years
4.3
/5
(6)
+2
Automatic Servo Controlled Voltage Stabilizers, For Stabilization, UPS Systems, Certification : CE Certified
₹ 4,000 - ₹ 5 Lakh
/ Piece
MOQ :
1 Piece
Power :
10-15kw, 15-20kw, 20-25kw, 25-50kw, 5-10kw, 50-100kw, servo stabilizers up to 5000kva. UPS systems up to 2000kva
Frequency :
50hz, 60hz
Packaging Type :
Standard as per manufacturing company
Output Type :
AC Single Phase, AC Three Phase, DC
Brand Name :
EATON
Automation Grade :
Automatic
Condition :
New
Certification :
CE Certified, ISO 9001:2008
Application :
Stabilization, UPS Systems
More details...
AM
Accutek Marketing
Ring Road, Surat, Gujarat
Verified
17 Years
Save Your Time
Post your Buy Requirement
Get Quotes from Verified Suppliers
Product & Services
I am interested in
Servo Stabilizer
Servo Voltage Stabilizer
Automatic Voltage Regulator
Quantity
Unit
Describe your Requirement
Mobile Number
Email ID
Get Quotes Now
VS-01 Automatic Voltage Stabilizer, Power : 50KVA
₹ 45,800
/ Piece
Power :
50KVA
Efficiency :
Better than 97 %
Phase :
Three Phase
Input Supply Frequency :
45Hz To 55Hz
Voltage Regulation :
+ 1%
Saving energy :
Stable
More details...
SARDAR Enterprise
Udhna, Surat, Gujarat
Verified
8 Years
4.0
/5
(2)
VS-01 Automatic Voltage Stabilizer
₹ 45,800 / Piece
Get Quote
VS-06 Automatic Voltage Stabilizer
₹ 6,999 / Piece
Get Quote
VS-07 Automatic Voltage Stabilizer
₹ 49,999 / Piece
Get Quote
VS-06 Automatic Voltage Stabilizer, Power : 50KVA
₹ 6,999
/ Piece
Rate of Correction :
Usually 25V/ SEC/Phase but depends on rating
Phase :
Three Phase
Efficiency :
Better than 97 %
Voltage Regulation :
+ 1%
Power :
50KVA
Input Supply Frequency :
45Hz To 55Hz
More details...
SE
SARDAR Enterprise
Udhna, Surat, Gujarat
Verified
8 Years
4.0
/5
(2)
50hz 2-3kg VS-07 Automatic Voltage Stabilizer, Feature : Shocked Proof, Stable Performance
₹ 49,999
/ Piece
Feature :
Shocked Proof, Stable Performance
Availability :
2-3kg
Frequency :
50hz
Cooling System :
Air Cooling
Power :
500VA
More details...
SE
SARDAR Enterprise
Udhna, Surat, Gujarat
Verified
8 Years
4.0
/5
(2)
+1
Servo Voltage Stabilizer 3 Phase Oil Cooled
₹ 3 Lakh - ₹ 6 Lakh
/ piece
MOQ :
1 piece
Output Type :
AC Three Phase
Condition :
New
Frequency :
50hz
Phase :
3
Feature :
Auto Cut, Works In Low Voltage
Automatic Grade :
Automatic
Brand Name :
PEC
Produce Power :
630 KVA
Certification :
CE Certified, ISO 9001:2008
More details...
Power Engineers Company
Deals in Surat
Verified
Platinum
14 Years
4.5
/5
(25)
Servo Voltage Stabilizer 3 Phase Oil Cooled
₹ 3 Lakh - ₹ 6 Lakh / piece
Get Quote
500 KVA OIL COOL THREE PHASE SERVO VOLTAGE STABILIZER
₹ 1 Lakh - ₹ 8 Lakh / piece
Get Quote
Three Phase Servo Automatic Voltage Controller Stabilizer
₹ 1 Lakh - ₹ 5 Lakh / piece
Get Quote
+3
500 Kva Oil Cool Three Phase Servo Voltage Stabilizer
₹ 1 Lakh - ₹ 8 Lakh
/ piece
Application :
Industrial
Feature :
Auto Cut
Number Of Flower :
LINEAR
Warranty :
5 YEARS
Brand Name :
PEC
Certification :
CE Certified, ISO 9001:2008
Automatic Grade :
Automatic
Condition :
New
More details...
PE
Power Engineers Company
Deals in Surat
Verified
Platinum
14 Years
4.5
/5
(25)
+5
Three Phase Servo Automatic Voltage Controller Stabilizer
₹ 1 Lakh - ₹ 5 Lakh
/ piece
Feature :
Auto Cut
Application :
Stabilization
Brand Name :
PEC
Output Type :
AC Three Phase
Automation Grade :
Automatic
Frequency :
50hz
Power :
1000 KVA
Condition :
New
Phase :
3
Certification :
CE Certified, ISO 9001:2008
More details...
PE
Power Engineers Company
Deals in Surat
Verified
Platinum
14 Years
4.5
/5
(25)
3 KVA Single Phase Servo Voltage Stabilizer
₹ 9,000
/ Piece
MOQ :
1 Piece(s)
Input/Output Connection :
Terminals of suitable rating
Response Time :
10 m sec
Capacity :
1 KVA to 150 KVA
Number Of Flower :
Indoor Floor Mounting
Make :
Desta
Ambient :
10 to 50 deg. C RH 95%
Output Voltage :
230/240 Volts. ± 1% Nominal. Front panel Adjustment with in ± 5% of Nominal Voltage
Reference Standard :
IS-9815, IS-2026
Supply Type :
Manufacturer
More details...
Desta Electricals (india)
Deals in Surat
Verified
Platinum
13 Years
4.6
/5
(24)
3 KVA Single Phase Servo Voltage Stabilizer
₹ 9,000 / Piece
Get Quote
500 KVA Three Phase Servo Voltage Stabilizer
₹ 1 Lakh / Piece
Get Quote
30 KVA Single Phase Servo Voltage Stabilizer
₹ 75,000 / Piece
Get Quote
500 KVA Three Phase Servo Voltage Stabilizer
₹ 1 Lakh
/ Piece
Insulation Resistance :
<6 Mega Ohms at 500V DC
Frequency :
50Hz
Brand Name :
DESTA
Production Capacity :
25 pcs./ month
Speed Correction :
15 to 25 Volts. / Sec.
Cooling Type :
Oil cooled
Body Material :
Steel
Output Voltage :
400 Volts. +- 1%
Supply Type :
Manufacturer
Input Voltage :
340 - 480Volts.
More details...
DE
Desta Electricals (india)
Deals in Surat
Verified
Platinum
13 Years
4.6
/5
(24)
30 KVA Single Phase Servo Voltage Stabilizer
₹ 75,000
/ Piece
Frequency :
50 Hz
Speed Correction :
15 to 25 Volts. / Sec.
Output Voltage :
230 Volts. + - 1 %
Capacity :
30 KVA
Brand Name :
DESTA
Cooling Type :
Air Cooled
Display Type :
Digital
Phase :
Single Phase
Production Capacity :
100 Pcs. / Month
Supply Type :
Manufacturer
More details...
DE
Desta Electricals (india)
Deals in Surat
Verified
Platinum
13 Years
4.6
/5
(24)
25KVA Single Phase Servo Controlled Voltage Stabilizer
Get Price Quote
Country of Origin :
110V, 220V, 380V
Feature :
Auto Cut, Easy Operate, Shocked Proof, Stable Performance
Output Type :
AC Single Phase
Frequency :
50hz
Condition :
New
Power Capacity :
10-15kw, 15-20kw
More details...
Cosco Electronics
Deals in Surat
Verified
Platinum
11 Years
4.4
/5
(14)
25KVA Single Phase Servo Controlled Voltage Stabilizer
Get Best Deal
Get Quote
KVA-DW Single Phase Servo Controlled Voltage Stabilizer
Get Best Deal
Get Quote
20KVA Single Phase Servo Controlled Voltage Stabilizer
Get Best Deal
Get Quote
KVA-DW Single Phase Servo Controlled Voltage Stabilizer
Get Price Quote
Output Type :
AC Single Phase
Warrenty :
2years
Condition :
New
Frequency :
50hz
Country of Origin :
India
Power Capacity :
10-15kw, 15-20kw, 20-25kw
Feature :
Easy Operate, Shocked Proof, Stable Performance, Works In Low Voltage
More details...
CE
Cosco Electronics
Deals in Surat
Verified
Platinum
11 Years
4.4
/5
(14)
20KVA Single Phase Servo Controlled Voltage Stabilizer
Get Price Quote
Frequency :
50hz
Country of Origin :
India
Output Type :
AC Single Phase
Power Capacity :
10-15kw, 15-20kw
Feature :
Easy Operate, Shocked Proof, Stable Performance
Condition :
New
More details...
CE
Cosco Electronics
Deals in Surat
Verified
Platinum
11 Years
4.4
/5
(14)
Servo Automatic Voltage Controller Stabilizer
₹ 1 Lakh - ₹ 2 Lakh
/ Piece
MOQ :
1 Piece
Brand :
Power
Country of Origin :
India
Supply Type :
Manufacturer
Cooling Type :
Oil cooled
Control Type :
Relay controller, Digital controller, Micro controller
Power :
70 KVA - 5000 KVA
Automatic Grade :
Automatic, Manual
More details...
ARORA ELECTRICALS
Deals in Surat
Verified
Platinum Plus
13 Years
4.4
/5
(22)
Servo Automatic Voltage Controller Stabilizer
₹ 1 Lakh - ₹ 2 Lakh / Piece
Get Quote
Servo Voltage Controller Stabilizer
₹ 1 Lakh - ₹ 2 Lakh / Piece
Get Quote
servo voltage stabilizer
₹ 1 Lakh - ₹ 2 Lakh / Piece
Get Quote
Servo Voltage Controller Stabilizer
₹ 1 Lakh - ₹ 2 Lakh
/ Piece
Phase :
Three Phase
Warranty :
1 year
Material :
Copper
Supply Type :
Manufacturer
Automation Grade :
Automatic
Country of Origin :
India
More details...
AE
ARORA ELECTRICALS
Deals in Surat
Verified
Platinum Plus
13 Years
4.4
/5
(22)
Servo Voltage Stabilizer, Power:70-5000 KVA
₹ 1 Lakh - ₹ 2 Lakh
/ Piece
Country of Origin :
India
Supply Type :
Manufacturer
Phase :
Three Phase
Brand Name :
Power
Warranty :
1 year
Cooling Type :
Oil cooled
Usage/Application :
Industrial
More details...
AE
ARORA ELECTRICALS
Deals in Surat
Verified
Platinum Plus
13 Years
4.4
/5
(22)
MEC Automatic Servo Voltage Stabilizer
₹ 1 Lakh
/ Piece
Brand Name :
MEC
Supply Type :
Manufacturer
Input Voltage :
220 V TO 350V
Power :
500KVA TO 1000KVA
Automatic Grade :
Automatic
Frequency :
50Hz
Capacity :
Upto 5000KVA
Output Voltage :
400/415 V
Phase :
Three Phase
More details...
Mangal Engineers and Consultants
Deals in Surat
Verified
Platinum Plus
16 Years
4.6
/5
(27)
Automatic Servo Voltage Stabilizer
₹ 1 Lakh / Piece
Get Quote
Three Phase Automatic Voltage Stabilizer
₹ 1 Lakh / Piece
Get Quote
Automatic Controlled Oil Cooled Voltage Stabilizer
₹ 1 Lakh / Piece
Get Quote
Three Phase Automatic Voltage Stabilizer, Power : Upto 5000 KVA, 3000 KVA
₹ 1 Lakh
/ Piece
Grade :
Automatic
Output Voltage :
400 V
Phase :
Three Phase
Brand Name :
Other
Capacity :
500 KVA To 5000 KVA
Power :
Upto 5000 KVA,3000 KVA
Supply Type :
Manufacturer
Country of Origin :
Upto 33 KV
Condition :
New
Frequency :
50 Hz
More details...
ME
Mangal Engineers and Consultants
Deals in Surat
Verified
Platinum Plus
16 Years
4.6
/5
(27)
Automatic Controlled Oil Cooled Voltage Stabilizer, Power : 5000 KVA
₹ 1 Lakh
/ Piece
Brand Name :
MEC
Material :
Iron
Number Of Flower :
Automatic
Supply Type :
Manufacturer
Phase :
Three Phase
Input Voltage :
320 - 480 V
Power :
5000 KVA
More details...
ME
Mangal Engineers and Consultants
Deals in Surat
Verified
Platinum Plus
16 Years
4.6
/5
(27)
Three Phase Servo Voltage Stabilizer, For Industrial, Feature : Easy Operate, Stable Performance
Get Price Quote
MOQ :
1 Piece
Number Of Flower :
Servo Voltage Stabilizer
Country of Origin :
440V
Phase :
Three Phase
Application :
Industrial
Automatic Grade :
Automatic
Feature :
Easy Operate, Stable Performance
Supply Type :
Supplier
More details...
Chandigarh Engineers
Deals in Surat
Trusted
4 Years
5.0
/5
(1)
Ask a question about
Voltage Stabilizer
Ask Expert
Let our Experts answer you.
Dolphin Metal Automatic Servo Voltage Stabilizer, Feature : Easy Operate, Stable Performance
Get Price Quote
MOQ :
1 Piece
Phase :
Three Phase
Supply Type :
Manufacturer
Cooling System :
Oil Cooling
Country of Origin :
India
Feature :
Easy Operate, Stable Performance
Material :
Metal
Load Capacity :
500KVA
Brand Name :
Dolphin
More details...
Solar Powertech Solutions
Deals in Surat
Verified
Platinum
13 Years
4.5
/5
(27)
Automatic Servo Voltage Stabilizer
Get Best Deal
Get Quote
Oil Cooled Servo Voltage Stabilizer
Get Best Deal
Get Quote
75kVA Three Phase Oil Cooled Servo Stabilizer
Get Best Deal
Get Quote
Oil Cooled Servo Voltage Stabilizer
Get Price Quote
Country of Origin :
India
Operating Frequency :
47Hz to 53 Hz
Brand Name :
Dolphin
Normal Operating Temperature :
90 % RH Max. Non-Condensing at 35 deg C
Output Voltage Regulation :
+/- 1%
Supply Type :
Manufacturer
Waveform Distortion :
Nil
Output Waveform :
True Reproduction of Input
Short CKT Period & percentage :
300 % for 250 m. sec.
Correction Rate :
15 V/ 20 V/ 35 V/ Sec-1Ph, 25 V/ 35 V/ 60 V/ Sec-3Ph, 110V/Sec for D.C. Motor controlled
More details...
SP
Solar Powertech Solutions
Deals in Surat
Verified
Platinum
13 Years
4.5
/5
(27)
75kVA Three Phase Oil Cooled Servo Stabilizer
Get Price Quote
Cooling Method :
Oil Cooled
Brand Name :
Dolphin
Phase :
Three Phase
Supply Type :
Manufacturer
Country of Origin :
India
Load Capacity :
75KVA
Material :
Metal
Finish :
Coated
More details...
SP
Solar Powertech Solutions
Deals in Surat
Verified
Platinum
13 Years
4.5
/5
(27)
Unbalance Oil Cooled Servo Controlled Voltage Stabilizer
Get Price Quote
MOQ :
1 Piece
Warrenty :
1year
Capacity :
3 to 2000 KVA
Cooling System :
Oil Cooled
Output Type :
AC Three Phase
Brand Name :
Krany
Operating Temperature :
50 Degree C
Supply Type :
Manufacturer
Automatic Grade :
Automatic
Efficiency :
Greater than equal to 98%
More details...
Vishnu Trading Co.
Deals in Surat
Trusted
4 Years
5.0
/5
(1)
Unbalance Oil Cooled Servo Controlled Voltage Stabilizer
Get Best Deal
Get Quote
3 KVA Servo Voltage Stabilizer
Get Best Deal
Get Quote
100 KVA Servo Voltage Stabilizer
Get Best Deal
Get Quote
Automatic 3 KVA Servo Voltage Stabilizer, For Industrial, Feature : Shocked Proof, Stable Performance
Get Price Quote
Supply Type :
Manufacturer
Brand Name :
Krany
Country of Origin :
India
Feature :
Shocked Proof, Stable Performance
Automatic Grade :
Automatic
Application :
Industrial
Input Voltage :
295-465 V
More details...
VT
Vishnu Trading Co.
Deals in Surat
Trusted
4 Years
5.0
/5
(1)
100 KVA Servo Voltage Stabilizer, For Industrial, Feature : Auto Cut, Shocked Proof, Stable Performance
Get Price Quote
Capacity :
100 KVA
Condition :
New
Warrenty :
1year
Application :
Industrial
Country of Origin :
India
Feature :
Auto Cut, Shocked Proof, Stable Performance
Automatic Grade :
Automatic
Number Of Flower :
Servo Voltage Stabilizer
Brand Name :
Krany
Supply Type :
Manufacturer
More details...
VT
Vishnu Trading Co.
Deals in Surat
Trusted
4 Years
5.0
/5
(1)
+2
Servo Control Voltage Stabilizer, Power : 125 KVA
Get Price Quote
Percentage :
300% for 250 Milli Sec
Phase :
Three Phase
Correction Speed :
70 V per second
Input Voltage :
160 V - 250 V
Input Frequency :
47-53 Hz
Power :
125 kVA
More details...
Simex Electro - Tech Systems
Deals in Surat
Verified
Platinum
12 Years
4.3
/5
(20)
50hz AC Servo Voltage Stabilizer, For Stabilization, Feature : Easy Operate, Shocked Proof, Stable Performance
₹ 50,000 - ₹ 50 Lakh
/ Piece
MOQ :
1 Piece(s)
Brand Name :
AEL
Condition :
New
Feature :
Easy Operate, Shocked Proof, Stable Performance
Country of Origin :
110V
Availability :
1-2kg
Application :
Stabilization
Supply Type :
Manufacturer
More details...
Automatic Electric Ltd.
Deals in Surat
Verified
Platinum Plus
10 Years
4.7
/5
(12)
AC Servo Voltage Stabilizer
₹ 50,000 - ₹ 50 Lakh / Piece
Get Quote
Single Phase AC Voltage Stabilizer
Get Best Deal
Get Quote
Single Phase AC Voltage Stabilizer
Get Price Quote
I Also Provide :
Fresh
Mounting Type :
Floor
Phase :
Single Phase
Payment Terms :
Online
Supply Type :
Manufacturer
Brand Name :
AEL
Current Capacity :
Yes
Country of Origin :
Made in India
More details...
AE
Automatic Electric Ltd.
Deals in Surat
Verified
Platinum Plus
10 Years
4.7
/5
(12)
50hz Servo Voltage Stabilizer, Feature : Easy Operate, Stable Performance
Get Price Quote
Automatic Grade :
Semi Automatic
Country of Origin :
220V
Output Type :
AC Single Phase
Feature :
Easy Operate, Stable Performance
Frequency :
50hz
Warrenty :
1year
More details...
Chauhan Electronics
Deals in Surat
Verified
Platinum
12 Years
4.5
/5
(22)
Automatic Servo Voltage Stabilizers, Feature : Stable Performance
Get Price Quote
Warrenty :
1year
Frequency :
50hz
Automatic Grade :
Automatic
Feature :
Auto Cut, Stable Performance, Works In Low Voltage
Supply Type :
Manufacturer
More details...
Tejindra Electric Works (Regd.)
Deals in Surat
Verified
Platinum
22 Years
4.5
/5
(24)
Servo Controlled Voltage Stabilizer
Get Price Quote
Environment :
Designed for indoor tropical use
Regulation :
+/- 1% or 0.5%
Efficiency :
Better than 98%
Wave form distortion :
Nil
Output Voltage :
230 VAC (1 phase), 415 VAC (3 phase) 4 wire system.
Ambient :
0-45C max relative humidity upto 90%
Enclosure :
IP 23
Effect of Load Power Factor :
Nil
Supply Frequency :
47 - 53 MHz
More details...
NEELKANTH POWER SOLUTIONS
Deals in Surat
Verified
Platinum Plus
7 Years
5.0
/5
(1)
View More Results
Get Best Sellers for
Voltage Stabilizer
I am interested in
Servo Stabilizer
Servo Voltage Stabilizer
Automatic Voltage Regulator
Quantity
Unit
Describe your Requirement
Mobile Number
Email ID
Submit Requirement
To List your Product
Boost Your Business Visibility Worldwide
Register Now
Save Your Time
Tell us your Buy Requirement
to Get Instant Response
Product & Services
I am interested in
Servo Stabilizer
Servo Voltage Stabilizer
Automatic Voltage Regulator
Quantity
Unit
Describe your Requirement
Mobile Number
Email ID
Get Quotes Now
This Data was Last Updated on 19/11/2025
Our Services
Advertise with us
Membership Plan
Banner Advertisement
Buyers
Post Your Requirement
Browse Suppliers
Manufacturers Directory
Country Suppliers
Buyer FAQ
Sellers
Sell Your Product
Latest Buyleads
Seller FAQ
Quick Links
About Us
Web Stories
Jobs & Careers
Contact Us
Feedback
Complaint
Testimonials
Disclaimer
Sitemap
LIVE
COVERAGE
Connect with us
Waiting for permission
To search by voice, go to your browser settings and allow access to microphone
Allow microphone access to search with voice