Description: This item is a car Bluetooth kit, which includes, among other things, an FM transmitter and two USB charging ports. Plug the item into your car's cigarette lighter socket, then it will turn on automatically. It is compatible with most Bluetooth-enabled devices. Features: Color black. Material: ABS. Size: About 3.4 * 7.8cm / 1.34 * 3.07in (L * W). Bluetooth Version: V2.1 Support A2DP, AVRCP, HFP, HSP. Wirelessly transfer phone call from Bluetooth cellphone to car FM stereo Automatically switch to hands-free mode when receiving calls. Stream music from Bluetooth device to car FM stereo system with A2DP function Support music playback from USB disk Support MP3/WMA files. Takes power from the cigarette socket in the car. Dual USB outputs 5V / 3.4A, charges iPhone, iPad, iPod and other devices Full channels optional from 87.5-108MHz. LED displays the number With voltage detection to remind your car battery health status. Incoming Number Announcement Redial the last call. Package Includes: 1 x Wireless Bluetooth Car FM Transmitter 1 x User Manual