Features: MT21 50x2+100W Digital Amplifier Board delivers immersive stereo sound with 100W subwoofer output and bluetooth-compatible connectivity, perfect for powerful stereo systems requiring robust bass performances. Featuring 2 channel 50W+100W output, bluetooth-compatible inputs, and 12 24V wide voltages compatibility, this compact metal PCB module ensures stable operations with optimized heat dissipation for prolonged use. Ideal for DIYer stereo enthusiasts, home theater builders, and electronics hobbyists seeking professional amplification in speakers projects or systems upgrades. Effortlessly power bookshelf speakers in living rooms, enhances car stereo systems, or drives subwoofers for outdoor movie night with clear mids/highs and distortion resistant bass. Engineered with digital efficiency and premium components, this amplifier board maintains clear across genres while its space saving design simplifies integration into existing setups. Specifications: Component: Metal, PCB Applicable power supply: DC12V~24V Output Power: left and right channels <50W, subwoofer <100W Input: Bluetooth-compatible input + 3..5mm input Number of channels: 2.1 channel Applicable speakers: 20~100W.4~8Q Package Includes: 1Piece Power Amplifier note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.