Wireless microphone

Wireless microphone
product description:
1.adopt vhf210mhz - 270 mhz frequency
2.adopt multilevel narrow-band high frequency and medium frequency frequency selective filter, fully eliminate the interference signal
3.smt components design, noninterference when multiple sets are used at the same time
4.adopt the extended audio compression technology, greatly reduce noise and increase dynamic range
5.sets back the noise low speed decrease the function, can effectively reduce the feedback noise
6.receiver using multilevel high frequency amplifier, has a very high sensitivity
parameters:
carrier frequency: vhf210mhz-270mhz
frequency stability: 90 db
harmonic distortion: 88 db
dynamic range:> 90 db
image interference ratio> 80 db
adjacent channel sensitivity:> 80 db
receiver sensitivity:> 5dbu (sinad = 20 db
transmit power: 30mw
modulation mode: fm
maximum modulation: â± 35khz
high harmonics main porgy quasi low: 40 db or more
power supply voltage: 3v battery
use time: about 6-8 hours.