Brand new and high quality Features: TF: Connect TF memory card (up to 32GB) USB: Connect USB flash drive (up to 32GB) LED Indicator PREV / VOL-: Short press for previous song; long press to decrease volume PLAY/PAUSE: Short press is the switch between pause and play; long press is the switch for USB/TF/FM/AUX/Bluetooth-compatible audio, in radio FM mode, the short pause for play button automatically searches; NEXT / VOL +: Short press for next song; long press to increase volume; Supports MP3 / WMA / WAV / FLAC / APE Supports: MP3 / USB (U disk) / TF / LINE IN / FM / BLUETOOTH Power: 5V 12V Three buttons: PREV/ PLAY / NEXT; 1. PREV button (previous song / volume reduction): In MP3 state, PREV short press is the previous song and long press is volume reduction. 2. PLAY button (play/pause): PLAY short press for play/pause in MP3 mode; long press is USB/TF card/AUX/Bluetooth-compatible mode tone switch. 3. NEXT button (next song / volume increase): NEXT short press for next song in MP3 mode, long press for volume to increase; 4. This model has the function of automatic conversion device. When there is no device, the default is in Bluetooth-compatible state. If there is a device, the device is interpreted first. Specifications: Music Format: MP3 / WMA / WAV / APE / FLAC lossless format Radio FM Frequency: 87.5-107.5 MHZ Support Function Introduction: supports MP3 / USB / TF / LINE IN / FM / Bluetooth-compatible 5.0 / remote control Panel Size: 5x2.4cm Color: silver, black Notes: 1. Please allow 0-1cm error due to manual measurement. Please make sure you don't mind before bidding. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1x Decoder Board