kuman for Raspberry Pi Lithium Battery Pack Expansion Board RPI Power Pack Power Supply+ USB Cable + 2 Layer Acrylic Board for Pi 3 2 Model B KY68C (Power) Version: The latest Bluetooth 4.0 (fully backward compatible & A2DP profile) for full-speed transmission and low power consumption. Simply and fast pairing. Paired your phone with the Bluetooth FM Transmitter and its hands-free system can set free your hands during answer the calls and let you safely drive. Humanized Design: The adjustable neck suits for different vehicles. Built-in 3.5mm audio interface allows you connect any devices which unsupported Bluetooth function such as Mp3, Mp4, and other old type cell phones.LCD scree and Five function buttons are easy to press and responsive. Dual USB car charger :Free Dual USB car charger included, capable of charging two devicesStable performance,fast charging, no heat emission. Each port can output 2.4A( MAX) electric current, more efficient. Compatible Modes: IPod/iPhone 6 6 plus, Samsung, iPad, HTC,FIRE,Nokia and and all Bluetooth Devices