BT version: 5.0 (No obstruction, 10m) Input method: AUX+BT+USB flash drive+Microphone Number of channels: 2.0/5.0/5.1 channels Adaptive power supply: DC12-24V/5A or above Adaptive speaker: 20-100W/3-8Ω Product Name: High end home theater/KTV amplifier Product model: -AS200 Power amplifier chip: TPA3116D2 Output power: 20W * 2 @ 12V, 8Ω 30W * 2 @ 19V, 8Ω 40W * 2 @ 24V, 8Ω 30W*2@12V, 4Ω 50W*2@19V, 4Ω 100W*2@24V, 3Ω Protection mechanism: Overvoltage, undervoltage, overheating, DC detection, short circuit protection Product size: 183x103.5x43mm Product weight: Net weight 757g Tip: Only when the audio signal input is large enough and the power supply voltage/current is large enough, can there be sufficient output power! The higher the power supply voltage, the greater the output power, and the smaller the speaker impedance, the greater the output power!!! Please that the power of the adapted power supply is the actual working power of the amplifier!!! Color:Black Material:Aluminium Package Contents: 1 * Bluetooth amplifier 1 * remote control (The product does not include power supply and microphone) 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.