Features 1.[Choose The Right Voltage] The higher the voltage the higher the current the better the output power it is recommended to use more than 3A current 18V19V24V power supply. 2.[BT Mode] Sound amplifier board supports both AUX and BT input BT mode is preferred BT 5.0 sound amplifier board module use it for better results. 3.[Control BASS] The BASS potentiometer in the middle of the amplifier board is to control BASS the right BASS enhancement the left bass attenuation. 4.[Protection Mechanism] The amplifier module has overvoltage undervoltage overheat DC detection short circuit protection mechanism which makes it safe to keep in use. 5.[Excellent Sound Quality] BT sound amplifier board with 2.0 left and right dual channel stereo support volume adjustment intelligent noise reduction easy to use. Specification Item Type: Amplifier BoardMaterial: PCBBT Version: 5.0SNR: >90 DBSound Input: AUX BTChannel: 2.0Output Power: 100W x 2Adapter Speaker: 20W-200W 4-8Q Package List 1 x Power Amplifier Board1 x Cover Plate1 x Base Plate3 x Knob Set1 x Screwdriver8 x Screws4 x Short Screw Post4 x Long Screw Post