Wireless Bluetooth FM Transmitter Modulator Radio Adapter Car Kit for Handsfree Calling & Music W Charging Port for Bluetooth Enabled Smartphones, Tablets and MP3 Players Compatible with your smartphone, tablet or MP3 Bluetooth enabled device Randomly adjust the angle, suitable for all vehicles, and CVC technology cancel echo and reduce ambient noise Enjoy hands-free calls, music playing, USB charging, FM transmitter, automatically power-off memory and more functions; Built-in chargeable lithium battery, you can charge your devices via the USB port; Full frequency range from 87.5 to 108Mhz.