ZK-MT21 2.1 Channel Bluetooth Amplifier Board Mini 12V-24V with Subwoofer

A 2.1-channel Bluetooth amplifier board for DIY audio builds, designed to run on a DC 12V to 24V supply rated at 5A or above. The power supply is not included. It drives left and right speakers rated up to 50W each at 4 to 8 ohms, plus a subwoofer output rated up to 100W. Inputs include Bluetooth 5.0 with a stated range of up to 33 feet and a 3.5mm AUX jack. Controls cover master volume, subwoofer level, subwoofer crossover frequency from 20 to 200Hz, and bass and treble for each channel. The kit includes top and bottom covers, screws, knob caps and a screwdriver for assembly.