Product: Class D audio decoding amplifier Amplifier IC: TPA3116 x 2 Input voltage: DC12-26V Op amp: 5532 Channel: 2.1 channel Bluetooth version: V5.3 Function: U disk + external audio input + Bluetooth + APP + front-end output Audio input: 3.5MM headphone jack Output power: 2 x 60W+150W Output impedance: 4-8Ω full-range speaker + 3-8Ω bass speaker Note: 1.The higher the voltage, the louder the sound. Please give up this misconception. Only the right power supply and the right speakers can produce perfect sound. 2.The power supply and speakers determine the output power of the amplifier. (Please refer to the power output table in the details page) 3.Our power amplifier input DAC generally requires 1.5V-2V. If your decoding DAC output is 500mV-1V, that is not enough. Even if your power supply and speaker are adapted, the power amplifier output cannot reach 2x100W. 4.The product needs to be assembled by yourself (The product appearance and printed words may vary depending on the batch, but this does not affect use) Specifications: A: Black remote control / B: White remote control Color: Black Material: PCB Package Contents: 1 x remote control 1 x Amplifier Board (Screwdriver color is random,Specified color is not accepted) Only 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.