Feature: 1. The decoding board supports Bluetooth 5.0 version + APP control and hands‑free calls. 2. The decoding module supports audio input 3.5AUX+3PAUX, and support USB sound card function. 3. The decoder supports folder selection play, and switching between USB/SD/Bluetooth/FM/AUX. 4. The MP3 decoder supports USB/card switching, previous song, next song, volume adjustment, EQ, play/pause, stop, single song repeat, mute, shutdown, direct song selection. 5. It supports bluetooth previous song, next song, volume adjustment, play/pause, mute. It also supports power‑off memory function. Specification: Item Type: Decoding Board Material: PCB Panel Size: Approx. 92x35x29mm / 3.6x1.4x1.1in Hole Size: Approx. 75x27x29mm / 3.0x1.06x1.14in Center Spacing of Screw Holes: Approx. 80mm/3.15in PCBA Size: Approx. 71x29x20mm / 2.8x1.1x0.8in Power Supply Voltage: 5V or DC 7V-12V (different input terminals, choose one of the two channels) Current: 800MA-1A Battery: 1 x CR2025 . Package List: 1 x Decoding Board1 x Power Cable1 x Connection Line1 x Remote Control