Amplifier can only be used with 220V~240V 50Hz/60Hz AC power supply. Support 4-16 ohm speakers.Built-in professional Karaoke chip. Improve the microphone input sound effect.Front right channel: 50W / Front left channel: 50W.Surround right channel: 30W / Surround left channel: 30W.Center channel: 50W / Bass channel: 50W.In addition to Bluetooth, you can use a variety of ways to connect your player (including televisions, mobile phones, computers, projectors, etc.).1. You can use the hdmi/coaxial/optic audio cable to connect TV.2. You can use a 2 to 2 audio cable to connect your TV's RCA audio output jack.3. You can use 1 to 2 audio cable to connect your TV headset jack.This amplifier supports lossless music playback, you can play multiple formats of music via USB input (including APE/FLAC/MP3/WMA).