pack Of 2 Hands-free&Safe driving Totally free your hands, just press the phone call button and speak, while you are driving with both hands safely. High-performance built-in microphone with Echo Cancellation and Noise Suppression (CVC) technology offer you a clear talking. you can enjoy musice via bluetooth when driving,enjoy yourself Play Music via USB/TF Card(?32GB) Automatically play and transmit the MP3 files from Mobile Phone USB Flash Drive and TF Card. Playing music to Relax your body and mind during your driving. Play Music via 3.5mm Audio Cable play music with the 3.5MM aux cable provided. Play Music via Bluetooth please kindly open your bluetooth in your device and turn on the transmitter ,search G7 in your phone and click connect,play your music in your phone then your car can play music at the same time. Bluetooth sound processing A2DP, offers a comfortable stereo music playing. Compatibility Compatible with all Bluetooth enabled devices, like iPhone, iPad, iPod, Tablet, and Andriod Smartphones; great for older cars with all newfangled technology. One of the industry’s smallest Bluetooth Car chargers, portable and compact.Blue LED digital screen display of FM frequency and car voltage. Package Included: 1x Bluetooth FM Transmitter with one USB Charge Port, 1x User Manual, 1X 3.5MM audio cable.