This is a description of the 2.1 Channel Wireless 5.0 Digital Amplifier Module, known for its HIFI High Fidelity Subwoofer ZK-TB21.
Packing Include:
ZK-TB21 Power Amplifier Board * 1
Protective Shell * 1 Set
Power Adapter * 1
Screwdriver * 1
Knob * 5
Please be aware that the power supply is not included with the product, so you will need to provide your own.