Features: 1.Hands Free Function: The Bluetooth transmitter receiver allows you to transmit music and calls directly from your Bluetooth device to your car's stereo system. The built in microphone gives you hand free function. 2.2 USB Ports: Car Bluetooth receiver has a mini SD card reader and contains 2 USB ports for fast charging and smart detection. 3.Noise Reduction: Car radio adapter supports AUX, BLUETOOTH, USB, and TF CARD with advanced interference and noise cancellation technology: CVC technology suppresses noise. 4.Advanced Material: Car radio adapter is made of high grade ABS, which is rustproof, wear resistant, sturdy and durable and has a long service life. 5.Easy to Use: You can place the car music player in the air vent of your vehicle or glue it to the dashboard (without damaging the dashboard). Specification: Item Type: Bluetooth Transmitter_x000D_ Material: ABS_x000D_ Color: Black_x000D_ Features: Smart fast charging