When a person or business is concerned about eavesdropping happening on private conversations or in meetings the NG2000 has been designed specifically to address these concern, The NG2000 can detect and indicate the illegal activation of a mobile phone for eavesdropping control, In addition to this function, the NG2000 also creates interference to the surrounding area of the telephone"s microphone by generating "white noise" when radio-waves are detected; this noise suppresses the microphone in the telephone rendering it useless, Warns you with the help of the 3 LEDs and a sound alarm when the telephone starts exchanging data with the network, Automatic generation of audio interference (white noise), Accurate and sensitive detection of GSM 900/1800, CDMA850, WCDMA2100 (3G, UMTS) by Bluetooth intelligent algorithm of the microcontroller, Separate visual and sound indication of different communication protocols, Protable design, High sensitivity for detection with pre-selectors provides a better detection distance, Long battery resource of up to 5 days (low current consumption), Does not block the mobile network in the area, Unit Size: 3, 25 x 2 x , 25, Current 3 mcA/15mA standby/noise, Power source 3V, CR2430 battery, Frequency range Noise generator: 300-5000Hz, Detects: GSM 900/1800, CDMA850, WCDMA2100 (3G, UMTS ) Bluetooth, Includes:, Manual, Leather Case, 1 9V Battery, Generator, SKU: KJB782