Features: x 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. x With BT V4.1 technology, the car BT adapter provides a more stable and faster connection with no intermittent disconnections. x 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. x Multi-Point function, this BT car kit could connect with two smart phones at the same time. x 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 x 8.7 x 3cm Package weight: 82g Package List: 1 x Wireless FM Transmitter 1 x Dual Port USB Car Charger 1 x User Manual