About this item HIFI AUDIO AMPLIFIER BOARD: This mini Bluetooth audio amplifier board is a 2.0 channel amp, capable of connecting to two passive speakers (20-200W, 4-8), DC7-24V/5A and above. This power amplifier features two TPA3116D2 chips, 4 red and gray ring inductors, with a distortion rate below 0.3%, and upgraded large chips that support AAC Bluetooth decoding, APP, and low latency. MINI SIZE BUT POWERFUL: The audio power amplifier comes in a compact size of 4.41 x 2.76 x 1.97 inches, with a dual channel stereo output power of 100W+100W, suitable for 4-8 speakers. It is recommended to use 50-100W speakers for optimal performance. BLUETOOTH 5.0 INPUTS: The Bluetooth power amplifier board includes two input types: AUX and Bluetooth. The upgraded large chips support Bluetooth 5.0 with low latency. The range of audio devices (smartphones, tablets, laptops, etc.) that can connect via Bluetooth is 15m/49ft. Note: When using AUX mode, please ensure that the Bluetooth connection of this