Features 1.Support Bluetooth5.0, APP control, hands-free calls, and folder selective playing. 2.USB sound card function, multiple music format including MP3/WMA/WAV/FLAC/APE. 3.Support switching to the last song, next song, volume adjustment, play/pause, and mute. 4.Support power off memory function. The song and volume before power off can be continued to the current song. 5.Support both earphone and power amplifier (support earphone of 3 sections, not 4 sections). specificationItem Type: Decoder Board Condition: brand Material: ABS Color: Black Size: Approx. 92x35x29 mm/3.7x1.4x1.1in Hole Size: Approx. 75x27x29mm/3x1.1x1.1in Center Spacing of Screw Hole: Approx. 80mm/3.1in PCBA Size: Approx. 71x29x20mm/2.8x1.1x0.8in Voltage: 3.7-5V Current: 800mA-1A Bluetooth: Bluetooth 5.0 Remote Control Battery: CR2025 PackageList1 x Decoder Board3 x ConnectingCables1 x Remote Controller