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Made of high quality electronic components, it is solid, durable, stable performance and long service life. Adopting 2pcs TPA3116D2 chips, 2.1 channels with 2 stereo and 1 bass, lossless decoding, high efficiency, low distortion and low noise, the sound effect is good. Bluetooth 5.0 version, high speed transmission. With 3.5 sound frequency interface, it supports AUX input. Great amplifier board for DIY.