Audio Wireless Phase Detector

We are offering audio wireless phase detector.
I---general information
gdhx-8000 audio wireless phase detector is composed of two parts. One is voltage detecting transmitter rod (including insulated rod),which can judge a live line and send a signal of voltage phase angle of that conductor.
The other is voltage detecting and signal reception rod (including insulated rod), which indicates the phase relation by voice.
Ii---features
with latest electronic detecting technology and wireless transmission.
Moistureproof bushing insulator, which has strong dielectric strength.
No wire connection between two detecting rods, and signals can be received through the wall.
Only need two engineers to complete the test, one operating, the other monitoring.
Iii---specifications
detectable voltage range: 6-10kv, 6-35kv, 6-110kv
wireless transmission distance: ≥15 meters
working conditions: 0-40°c; ≤85% rh
working frequency: 45-60hz
power supply: 9v dry battery (1.5 years usage after a single charge)
weight: 1.5kg