luetooth 3.0 FM Transmitter Wireless Radio Adaptor 3.5 AUX USB With this wireless device, you can conveniently answer/ hang off/reject/redial calls through hands-free function. Noise and wind will be suppressed by CVC technology to create full duplex sound quality. What’s more, when it is pairing or Bluetooth is connected, voice prompt will tell you whether this device is connected successfully or not. It will automatically connect to its memorized paired Bluetooth devices when power on. Features: 1. Transmit audio files from TF card to car stereo system via FM radio signal. 2. It can play music files in the MP3, WMA formats. 3. Support TF card with a capacity of up to 32GB.(TF card is not included). 4. 1.44 inches screen large Display Screen.Display song, car battery, phone number. 5. Goose Neck Design.Flexible metal hose allows you to adjust its direction conveniently. 6. Fast Charging. With 5V/2.1A charging port, fast and high efficiency. 7. With 3.5mm audio port, it supports AUX input/output. Specifications: Bluetooth Version V3.0 + EDR Effective Bluetooth Range 10 meters FM Frequency 87.5MHz – 108.0MHZ Working Voltage 10V~24V Audio Input/Output 3.5mm audio interface USB Charging Port 5V/2.1A Bluetooth Connection Method: 1. Equipped with build-in Bluetooth chip,easy connected to other Bluetooth devices. 2. The pairing function will be activated automatically when the device is power on. 3. With the LED indicator’s 1 time/second blinking,search "T10",and then connect it.