2PCS ZK-TB21 Bluetooth Amplifier Board,Bluetooth5.1 TPA3116 Chip with Subwoofer 2.1 Channel 50W×2+100W, DC 12-24V Bluetooth and AUX Inputs,Stereo Digital AMP for DIY Home Speakers

The ZK-TB21 adopts TPA3116D2 chips (with AM interference suppression function), delivering excellent sound quality. The ZK-TB21 supports Bluetooth and AUX inputs, compatible with most devices such as smartphones, TVs, and laptops, allowing you to connect easily. The ZK-TB21 amplifier board supports a wide input voltage range from 12V to 24V DC, and can be powered by 12V, 15V, 18V, or 24V. The board is suitable for 30-200W, 4-8 speakers, and can be perfectly matched with speakers of all sizes. Whether it is a small speaker or a large audio equipment, it can be coordinated with the amplifier board.

2.1 channel amplifier: 50W+50W+100W. Bluetooth 5.0 wireless connection, Bluetooth+AUX audio input, 2.1 channel stereo output, with minimal sound distortion. The amplifier is designed with over-voltage protection, under-voltage protection, over-heat protection, and short-circuit protection, with a case to protect it.
Small size: 4.72 in * 3.94 in * 0.7 in. The mini amplifier features independent treble and bass adjustment buttons, allowing you to directly adjust the treble and bass through the module, without using the player or speaker. This 200W dual-channel Bluetooth audio amplifier board is widely used indoors and outdoors, such as for family, party, bar, band, concert, and carnival settings