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 is to select the previous song; long press is to decrease the volume for PLAY/PAUSE: Short press is the switch between pause and for play;Long press is the switch of USB / TF / FM / AUX / Bluetooth-compatible sound, in the radio FM state, the short pause for play button is automatically searched; NEXT/VOL+: Short press is to select the next song; long press is to increase the volume; Support MP3/WMA/WAV/FLAC / APE Support: MP3 / USB (U disk) / TF / LINE IN / FM / BLUETOOTH Power Supply: 5V 12V Three buttons: PREV/ for PLAY / NEXT; 1. PREV button (previous song/volume reduction): In the MP3 state, the PREV short press is the previous song, and the long press is the volume reduction; 2, for PLAY button (for play / pause): for PLAY short press for play / pause in MP3 state; long press is USB / TF card / AUX / Bluetooth-compatible mode test tone switch. 3, NEXT button (next song / volume increase): NEXT short press for the next song in MP3 state, long press for the volume to increase; 4. This model has the function of automatic conversion device. When there is no device, the default is in the 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: support 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. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Included: 1xDecoder Board