Spy Listening Device: it may use like your other PC mouse but it has extraordinary capabilities. Super-sensitive audio surveillance. Just insert a Sim card and call the device. Immediately hang up once get through then the number will call back and you will know the conditions within 10 meters around.</br> Call Back Function: set to voice activation and if the device hears anything it will call you. If somebody broke in and made noise the device would pick this up and call you. Sound activated call back function no flashing light sounds or vibration when activated by your call.</br> Digital Voice Recorder: support GSM 850/900/1800/1900MHz frequency; all 2G GSM SIM card compatible. Embedded condense microphones. The mouse voice bug can work 24/7 days as long as it is connected to a proper PC computer.</br> Battery Operated: it takes about 30 minutes to obtain a full charge. with a fully charged back-up battery the mouse voice bug can work continuously for 2 days under security warning mode.</br> Sensitivity Modulation: you could modulate the voice bug detection sensitivity as you wish. Sensitivity can be modulated from 10dB (highly sensitive) to 100dB (less sensitive).</br></br>Product Description</br></br><b>TOUGHSTY Spy PC Mouse with Call Back Function</b> <br> <br> <b>Ideal Home Security Device</b> <br> -Just insert a Sim Card & Call the device.Immediately hang up once getthrough??then the numeber will call back and you will know the conditions within 10 meters around. <br> - Set to voice activation and if the device hears anything it will call you. if somebody broke in and made noise?? the device would pick this up and call you. <br> -It may use like your other PC mouse?? but it has extraordinary capabilities.This is Spy PC Mouse with Call Back Function. <br> <br> <b>Key Features: </b> <br> 1) Sound activated call back function; Super-sensitive audio surveillance; No flashing light?? sounds or vibration when activated by your call; <br> 2) All 2G GSM SIM card compatible; Support GSM 850/900/1800/1900MHz frequency; Voice sensitive: -75db <br> 3) Embbed condense microphones; Rechargeable polymer li-ion battery built-in; <br> 4) Stand-by power consumption: 6mAh ??Working power consumption: 200mAh