Product Name: Mini 100W+100W Stereo Bluetooth Digital AmplifierMaterial: PCB+MetalProduct model: -AP100LBluetooth version: 5.1Transmission distance: 15 meters (unblocked)Colour: BlackMaterial: PCB+Metal supply: DC12-24VNumber of channels: left and right channel (stereo)Adapter speaker: 20W-200W 4 8Protection mechanism: reverse connection protection, short circuit protection, self-recovery overheat protectionUnique function: support Audio-APP controlProduct size: 58 x 58 x 18mmNote: The output of the supply should be greater than the output of the amplifier, otherwise it will affect the sound quality12V-8/12W+12W, 4/22W+22W19V-8/28W+28W, 4/greater than 55W+55W22V-8/37W+37W, 4/greater than 72W+72W24V-8/72W+72W, 4/greater than 100W+100WPackage Contents:1 x amplifier board1 x DC adapter1 x screwdriverOnly 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.