50W*4 XH-M180 TDA7850 Switchable 2/4-Channel Car Audio Amplifier Board Module
Chip model: TDA7850. Power: 4 50W. Output power: 4 50W. Channel: two/four channels (switchable). 1 Amplifier Board. Output resistance group: 4-8Ω. Fast and 100% assured, get the item you ordered or get your money back.