Block wireless earphone to receive radio signal
Work on frequencies of 100-200 / 400-500MHz
No interference with police and military channels
Coverage is 50 to 120 meter radius
No damage to wireless earphone
Radiation power above 1 meter is less than -10dBm
Power adjust range no less than 40dB
Working temperature is -30 to +60a??
Voltage is AC 220V
Weight is 1.2kg
Ideal for use in examination room, casino, sporting events etc

This device can block wireless and pinhole videos, cameras and recorders with in 15 meter radius through jam the frequencies used by these surveillance equipments.