1 x Bluetooth Hi-Fi Amplifier Board 1 x Remote Control 1 x DC Power Lin 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:4? Features: 1. Plays TF card, U disk, MP3 format...