1. Using the latest materials to develop high-power Bluetooth digital power amplifier board 2.1-channel high-fidelity sound quality2. The working voltage range is 18-50VDC, and the limit is 53V. It is recommended to use a DC power supply with a voltage of 36-48V and a current of 12A or above.3. Left or right channel-300W@50V, 4; 160W@50V, 8 Maximum power subwoofer 600W@50V2; 300W@50V, 4160W@50V, 8 In short, the higher the voltage, the smaller the resistance, the greater the output power4. Input undervoltage, overheating, overcurrent, short circuit protection. No input anti-reverse connection protection, positive and negative poles cannot be reversedProduct DescriptionType: power amplifier boardModel: AS21PSupply Current: StandardPower: standardUsage: standardSpecifications: integrated potentiometer AS21P, external potentiometerProduct name: 2.1 channel bluetooth power amplifier board 300W+300W+600WProduct model: -AS21PBluetooth chip: 5.1, transmission distance 15 metersInput : Bluetooth+AUX+U disk sound cardNumber of channels: 2.1, left and right channels + subwooferPower amplifier chip: two TPA3255Product size: Potentiometer integrated: 15 x 12 x 4cmProduct weight: Potentiometer integrated: net weight 387gMaterial: ABScolour: brownPackage Contents:1 x potentiometer integrated AS21POnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.