Features:  1. Plays TF card, U disk, MP3 format music, external audio source.  2. With remote control.  3. Large-capacity capacitor filter, the voltage is more stable to enhance anti-jamming capability.  4. Built-in short circuit protection design, better stability and compatibility.  5. High-quality power, speaker tweeter.  6. Audio dynamic output, treble output.  7. Power switch, high and low 3 key adjustment.  8. Bluetooth phone calls answer.  9. Perfect sound quality with no noise, small distortion, powerful shocking and bass.     Specification:  Size: 13.7 x 8 x 4.8cm.  Name: Bluetooth Hi-Fi Amplifier Board.  AC 220V ,DC 12V / 24V power conversion,compatible for household and car use.  Max. power: 50W.  Impedance: 4ohm.  Sensitivity: 200hV.  Hole diameter: 0.3cm.  Hole distance: 6.8cm.     Package includes:  1 x Bluetooth Hi-Fi Amplifier Board.  1 x Power Cord (US Plug, we will also send u an adapter that is suit for your country).  1 x Remote Control.  1 x DC Power Line.  1 x Speaker Wire