Features： 1、This wireless FM transmitter has a clear LED screen for better display of information such as phone calls, FM channels, music, car battery voltage and more. 2、With BT V4.1 technology, the car BT adapter provides a more stable and faster connection with no intermittent disconnections. 3、Noise reduction technology dampens road noise and provides you with clear and crisp hands-free call sound. High-quality music streaming ensures crystal-clear sound for listening to music and making hands-free calls. 4、Multi-Point function, this BT car kit could connect with two smart phones at the same time. 5、This wireless FM transmitter will automatically power on when you start your car and power off when you turn off your engine. Specification： Features: This wireless FM transmitter has a clear LED screen for better display of information such as phone calls, FM channels, music, car battery voltage and more. With BT V4.1 technology, the car BT adapter provides a more stable and faster connection with no intermittent disconnections. Noise reduction technology dampens road noise and provides you with clear and crisp hands-free call sound. High-quality music streaming ensures crystal-clear sound for listening to music and making hands-free calls. Multi-Point function, this BT car kit could connect with two smart phones at the same time. This wireless FM transmitter will automatically power on when you start your car and power off when you turn off your engine. Specifications:  Brand: Aukey  Color: black Material: abs Standrad: v4.1 Supported profile: A2DP,AVRCP,HSP,HFP Maximum working range: 33ft/10m Working voltage: DC 5V FM frequency range: 87.5-108.0MHz Interval: 0.1MHz Stability: 10ppm Package size: 10.2 * 8.7 * 3cm Package weight: 82g Package List: 1 * Wireless FM Transmitter 1 * Dual Port USB Car Charger 1 * User Manual Package List： 1 * Wireless FM Transmitter 1 * Dual Port USB Car Charger 1 * User Manual