Listening Surveillance Two Way Talking Audio Monitor N9 Excellent Standby Time GSM Triggle Alarm Real-time Listening Device 1. This item doesn't have GPS module inside. 2. N9 is aListening Surveillance, used to Audio Monitor It is small easy to install and use.With acoustic alarm function,this product is widely used in remote monitoring,positioning ,car secure and child care. 1. Two-Way Audio Spy Device 2. GSM voice/Audio monitor 3. Excellent stand by and working time 4. Prominent sound quality makes spying more reliable 5. Voice activation, you can call back your phone automatically when the sound rise up to 45DB 6. 100% Original Chip and PCB board. 7. With 2 Mi Holes, it has larger sound volume. 8. Super Mini size,portable, easy to carry. * Work frequency(850/900/1800/1900MHz) * Excellent stand by and working time * Prominent sound quality makes more reliable. * Power on: Open the back cover. Sim card into the deck will automatically boot.boot light is 3 seconds. After the lights go off you can dial the sim card number. * Installation: Please confirm the GSM netword signal strength. So as not to affect the results cause can not be used. *Number of settings:call the sim card number with mobile phone or telephone,hang up then setting success. * Voice feature: Send 1111 message to the sim card number then voice control is open; Send 0000 message to the sim card number then voice controlling is closed. * The flash of red light indicates the SIM card is correctly inserted. SIM will completed initialization and maintain in stand-by status and the light will be off and it is ready to go *Dial the SIM card number, you could hear the sound around the SIM card *Charging method:When the device is fully charged up,only Red LED lights ON.the Green LED light will OFF * Product Size: 45*30*14mm * Working current:below 10mA * Idle current:below 0.05mA * Stand-by Time: Acoustic alarm function on standby 3-5days;acoustic alarm function off standby 12-15days. * Work frequency(850MHz ,900MHz,1800MHz,1900MHz). Please check if it can work with your local system format before purchasing.