Wireless Compatible 5.0 Fm Transmitter Dual USB Chargers Hands-free Adapter Receiver MP3 Player Product Name: 5.0 Wireless FM Transmitter Blue-tooth-compatible Version: 5.0 Made of: ABS Working Voltage: 12V ~ 24V Power: 1W Music Format: MP3 USB1 Output: 5V / 3.1A Support U Disk Capacity: 1G-32G Blue-tooth-compatible Effective Distance: 5-10M FM Transmission Frequency: 87.5MHz-108.0MHz Connection Method: Blue-tooth-compatible/U Disk Packing List: 1 x Wireless FM Transmitter 1 x User Manual Note: 1. Due to manual measurement, please allow 1-3 cm error. Make sure you don't mind before bidding. 2. Due to difference of different monitors, the picture may not reflect the actual color of the product. Thanks. Dual USB Ports and 3.1A Car Charging: 2 USB charging ports can charge most USB devices. Input 12V/24V. Compatible with most smartphones, tablets and more. USB Design: The other USB port is specially designed for normal charging or reading U disk. Hands-free Calling: Microphones with built-in Echo Cancellation and Noise Cancellation technology effectively deliver full sound quality. Easily answer/redial/close or end calls with the click of a button. Music Playback: Support Blue-tooth-compatible music / U disk / TF card MP3 music player. Connect your smartphone or other Blue-tooth-compatible-enabled device via Blue-tooth-compatible to stream your music, or you can plug in a USB flash drive (up to 32GB) to enjoy your music. Fast Charging: The fast charging 3.1A port is 4 times faster than standard charging. The charging efficiency is more than 80%, saving time and reducing power consumption.