Features:1. This amplifier board adopts digital power amplifier chip TPA311602 to accomplish high efficiency running.2. This amplifier board integrates CSR865 4.0 Bluetooth module, with low power consumption, high transmission efficiency, good compatibility.3. Built-in many protection circuits including overvoltage, undervoltage, overheat, DC detection and short circuit.4. With Bluetooth status indication light to show the Bluetooth connection condition.5. High fidelity, low noise, very suitable for high quality sound equipment, instrument, control circuit and telephone channel amplifier.Specification:Model: XH-M548 Chip type: TPA3116D2 Bluetooth module: BTM835/CSR8635 (4.0 version)Transmission distance: Max. 10mVoltage: DC 12-24VCurrent: >3AOutput power: 120W*2Efficiency ratio: >90%Sound track: Dual trackSize: 98*80*18mm / 3.86*3.15*0.71inPackage weight: Approx. 80g/2.8ozPackage List:1 * Bluetooth Digital Audio Amplifier BoardNote: 1. Due to the difference between monitors and light effects, the pictures may not reflect the actual color of the item.2. Please allow slight error due to manual measurement. Thanks for your understanding.