Photo 1 of ARRAROWN Bluetooth 5.0 Audio Amplifier Board, ZK-MT21 2.1 Channel 50W X 2 +100W Mini Subwoofer Power Amp HiFi Digital Audio Amp Module for Home Speakers (20-100W, 4-8), DC 12-24V, BT AUX Input

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Photo 1 of ARRAROWN Bluetooth 5.0 Audio Amplifier Board, ZK-MT21 2.1 Channel 50W X 2 +100W Mini Subwoofer Power Amp HiFi Digital Audio Amp Module for Home Speakers (20-100W, 4-8), DC 12-24V, BT AUX InputPhoto 2 of ARRAROWN Bluetooth 5.0 Audio Amplifier Board, ZK-MT21 2.1 Channel 50W X 2 +100W Mini Subwoofer Power Amp HiFi Digital Audio Amp Module for Home Speakers (20-100W, 4-8), DC 12-24V, BT AUX Input