This Bluetooth MP3 player is designed for in-car use. It features a built-in Bluetooth module and MP3 decoder chip. It plays and transmits music from a TF card to your car stereo via FM radio signal. It streams music from your phone to your car stereo via Bluetooth. It functions as a hands-free car kit for safe driving via Bluetooth. It charges your phone/tablet via its USB port, with a maximum output of 2.5A. This device transmits wirelessly; no car modifications are needed. Use it for entertainment or hands-free calling for safer driving. Features: Bluetooth FM Transmitter: Stream music from phones/USB drives/TF cards to your car stereo. Sleek and stylish design with a polished finish. Car Charger: Charges phones/tablets via USB, with a maximum output of 2.5A. Bluetooth hands-free functionality. Plays music from USB drives or TF cards. Hi-Fi stereo sound using DIGITAL PLL phase-locked loop technology. LCD screen displays FM frequency and voltage for easy use. Wide frequency range (up to 200 frequencies selectable). Automatic memory function for the last used frequency. Specifications: Supports FM transmitter Includes LED display Supports audio input Plays music from USB drives Supports MP3/WMA music formats Supports answering/ending/rejecting/redialing calls Automatic shutdown function USB output: 5V/2.5A Max Compatible with: MP4, MP3, iPhone, Samsung, Laptops, Phones, Digital Cameras, and other AC and USB mobile devices. Product Dimensions (L x W x H): 6 x 8.80 x 3 cm Package Includes: 1 * Bluetooth Hands-free FM Transmitter 1 * User Manual