Features: Elevates your sound experience with ZK-TB21 Bluetooth-compatible Amplifier Module, delivering 50Wx2+100W output and precise bass control TPA3116D2 chip for clear 2.1 channel sound. This 2.1 channel power amplifier features independent control, Bluetooth-compatible input, and advanced protective circuits Perfect for audiophiles and enthusiasts professional grade sound customization in home theaters, car sound systems, or studio monitor setups. Transform living room into immersive entertainment or upgraded workshop sound systems with this amplifier 24V/5A power handling. Achieve sound reproduction across devices through Bluetooth-compatible wireless streaming while maintaining stable performances via optimized heat dissipation architecture. Specifications: Component:Metal Type:B/A Size:Approx. 18x100mm/4.64x3.93inch Bluetooth-compatible version: 5.0 (10m) Amplifier chip: TPA3116D2 Speaker: 20~100W, 4~8Ω Product model: ZK-TB21 Input sensitivity: 500mV Number of channel: 2.1 channel Power supply: 12~24V/5A or above Output power: left and right channel <50w, subwoofer <100W Package Includes: 1 Set Amplifier Module note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.