Detailed Description  This SIM device is a special system designed for audio surveillance or monitor by providing regular mobile phone SIM services. It has a magnetized core which helps itself easily fixed on any hidden metal surface.  A unique design, small frame and sturdy construction encompass the rich SIM technology beneath it's compact shell. Embed condense, sensitive microphone, which could pick up any ambient sound.  When the need comes, or unforgettable moment occurs, just dial up the SIM number, it runs silently at any circumstance, and help you capture needed sound of its surrounding.  Its internal battery could provide 2~3 hours working time, with external extra battery, it is capable of constantly running up to 6~7 hours. It is a covert surveillance tool made for everybody. * Frequency: 900\1800\1900  * Embed microphone, powerful sound receiving effect (Can receive sounds even 10 meters far away from the device)  * 24 hours non-stop power supply.  * All GSM SIM card compatible  * Stand-by time: 15 days  How it use? Operating Procedure( Caution)  Do not insert the SIM into the slot in the wrong direction.  * Charge the SIM card  * Take out the SIM card cover.  * Place the SIM card into the slot with the contact points facing the ground  (according to the pictures indication)  * Shift the left switch LED indication will be activated after the SIM card is correctly inserted.  SIM spy will completed initialization and maintain in stand-by status.  Just dial the SIM card number, you could hear the sound around the SIM card spy.  * Take out the SIM card 10 second later after the LED is off.  * Please do not use it to engage any illegal activity.