YS-AP50L Digital Bluetooth Amplifier Board Mini Version 50W+50W HIFI Product Name: Mini 50W+50W Stereo Bluetooth Digital Power Amplifier Board Product model: YS-AP50L Bluetooth version: 5.1 Transmission distance: 15 meters (unblocked) Power supply: DC12-24V Number of channels: left and right dual channel (stereo) Adapter speaker: 30W~-200W 4Ω 8Ω 16Ω Protection mechanism: power reverse connection protection, short circuit protection, self-recovery overheating protection Unique function: support YS Audio-APP control Note: The output power of the power supply should be greater than the output power of the power amplifier, otherwise it will affect the sound quality 12V-8Ω/15W+15W, 4Ω/20W+20W 15V-8Ω/18W+18W, 4Ω/ Greater than 30W+30W 19V-8Ω/32W+32W, 4Ω/ Greater than 45W+45W 24V-8Ω/40W+40W, 4Ω/ Greater than 50W+50W Material: PCB+Metal colour: black Package Contents: 1 x digital power amplifier board 1 x DC adapter 1 x screwdriver 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.