This 900W multi - function Bluetooth stereo amplifier, compatible with 12V, 24V, and 220V voltages, is perfect for both car and home audio systems. It has an optical fiber input port for connecting various audio sources, delivering pure sound quality. With a built - in subwoofer and karaoke function, it lets you enjoy cinema - like audio and singing fun at home or in your car. Its compact circuit design makes installation easy, being an ideal choice for upgrading home audio or enhancing in - car entertainment.