ITEM NAME:Home Theater Digital Power Amplifier Two-Channel Stereo DC12V 4A Description: Product name: Bluetooth audio amplifier board Product model: XH-A354 Function type: Amplify audio Bluetooth version: 5.0 Product size: 89x62x17mm/3.50x2.44x0.67inch Specification: Supply voltage:DC12V4A Standby current 80mA Output channel: two-channel stereo Output power: 2+*20W(49) Signal to noise ratio: 88% Installation size: 182x55mm/7.17x2.17inch Installation aperture: 3mm/0.12inch Fits for Yamaha YDA138-E Package Includes: 1 Piece Digital Amplifier Board SKU: DMO0010868479018642.1 Piece Digital Amplifier Board. Output channel: two-channel stereo. Output power: 2+ 20W(49). SKU: DMO0010868479018642. Fits for Yamaha YDA138-E.