Feature:1. EASY TO USE: Wireless digital power amplifier board has two input methods: BT and AUX. Allows you to adjust frequency levels, treble, bass, and more.2. QUICK CONNECTION: 2.1 channel power amplifier board, which can provide stable and fast connection and wide compatibility. Easy to install and use.3. HIGH OUTPUT POWER: Subwoofer amplifier module supports a maximum of 50W (left channel), 50W (right channel) and 100W (subwoofer) channel output.4. SAFE AND STABLE: BT digital amplifier board uses DC power 1224V, high quality PCB material and electronic components, stable and sensitive, and energy saving.5. REPLACEMENT: Wireless BT power amplifier board module provides good performance and is the best choice for replacing old or damaged modules.Specification:Item Type: BT Amplifier BoardMaterial: PCBBT Version: 5.0Working Voltage: DC12-24VInput Sensitivity: 500mVSound Input: AUX, BTChannel: 2.1Output Power: 2 x 50W (R and L Channels) and 100W (Subwoofer)Adapter Speaker: 20-100W, 4-8.Package List:1 x BT Amplifier Board1 x Cover1 x Bottom Plate1 x Adapter1 x Screwdriver5 x Knob Cover9 x Screw4 x Short Screw Column4 x Long Screw ColumnNote:Components may vary slightly from batch to batch, but functional performance remains the same.