Multi-functional design: Bluetooth FM transmitter, MP3 player, car charger and safety hammer all in one Bluetooth connection with your smartphones or tablets; support clear Bluetooth hands-free phone calls Support FM transmitter function, full frequency: 87.5-108MHz Support directly playing music from TF card/U disk MP3 music play (TF card and U disk not included) Max USB output 3.1A, can charge two devices at the same time Can also be used as a safety hammer for emergency situation LED display to show real-time FM frequency and car battery voltage Nickel plating workmanship, exquisite appearance Specification: Model: AP06 Bluetooth version: V4.2 Bluetooth effective range: 10 meters Bluetooth protocols: A2DP Rated working voltage: 12V-24V Limit voltage: 9-29V USB output: 5V/2.1A single, 5V/3.1A total Microphone effective range: 0.5-2 meters FM Frequency: 87.5MHz-108.0MHz Size: 88 x 44mm Compatible with: iPhone Samsung Huawei HTC Sony etc. smartphones and tablets Package included: 1 x AP06 Multi-functional Wireless Bluetooth FM Transmitter Hands-free Car Charger Safety Hammer Car Kit Accessory only, other items not included