Key Features: No flashing light, sounds or vibration when activated by your call; All 2G GSM SIM card compatible; Embbed condense microphones; Super-sensitive audio surveillance. Sound activated call back function; Rechargeable polymer li-ion battery built-in; Support GSM 850/900/1800/1900MHz frequency Specifications: GSM band module: 900/1800/1900 Voice sensitive: -75db Stand-by power consumption: 6mAh Working power consumption: 200mAh Battery Power: 3.7V 4200mA Charger Power: DC5V 500mA Net Weight: 80g Gross Weight:100g Unit Package Dimension: 120x90x40mm How to use it? Insert the sim card to the slot, then you dial the sim card number, the bug will automatically start listening mode,it will stop when the phone hang up. Call back Function:Send message "0000# + the number +#" to the Sim card which in the device to open the call back function,send message"0000##" to stop the function.
