Mini N9 GSM Listening and Surveillance Device Two-way Automatic Answering and Dialing Audio Monitoring and Surveillance Device Built-in Two Microphones1. There is no GPS module inside this product.2. N9 is a listening device for audio monitoring.The product is small in size and easy to install and use.The product has an audible alarm function and is widely used in remote monitoring, location, car security and child care.1. Two-way audio spy device2. GSM voice/audio monitor3. Excellent standby and working time4. Excellent sound quality for more reliable spying activities5. voice activated, automatic call back when voice is up to 45DB6. 100% Original Chip and PCB board.7. 2 Mi holes for more volume.8. Ultra mini size, easy to carry.* Power on: Open the back cover. it will power on automatically when the Sim card is inserted into the card holder. When the light turns off, you can dial the SIM card number.* Installation: Please check the signal strength of GSM network. This may affect the effect and make it unusable. Unable to use.* Setup times: Dial the SIM card number from cell phone or telephone, hang up and setup is successful.* Voice function: Send 1111 message to the sim card number, then voice control is on; send 0000 to the sim card number, then voice control is off. If you send 1111 message to sim card number, voice control will be turned on; if you send 0000 to sim card number, voice control will be turned off.* Red light blinks to indicate that the SIM card is inserted correctly. sim card