Subwoofer Audio Amplifier Board: 100W+100W Bluetooth wireless connection, Bluetooth+AUX audio input, channel stereo output, just a little sound distortion. Mini amplifier, size: 110 70 21mm, it doesn't take up much interference suppression function,shielding power noise preamplifier with low distortion.Extraordinary clarity Hi-Fi will be enjoy a more perfect sound quality experience.
eBay