Product Name :Bluetooth Digital Amplifier ModuleWorking voltage : DC: 8~24VBluetooth version :5Transmission distance: 15 meters (visual unobstructed)Number of channels: two channels (stereo)Output (@1KHz): 16W x 2 @12V 4 ohm10W x 2 @12V 8 ohm15W x 2 @16V 8 ohm20W x 2 @20V 8 ohm30W x 2 @24V 8 ohm (requires heat sink)Adapter speaker (30W~150W) 4 ohms (8~12V supply)8 ohms (8~24V supply)16 ohms (8~24V supply)Module protection mechanism: reverse protectionShort circuit protectionSelf-recovery overheat protectionInstructionsAfter the is turned on, the blue indicator light flashes quickly and enters the Bluetooth mode; after the "Beep" is broadcast, the pairing mode is entered to wait for pairing; the mobile phone Bluetooth searches for "XY-P15W" (the amplifier board device name), and clicks "XY-P15W". Connect, play the "Beep" after the connection is successful, the indicator light is long, you can play the music of the mobile phone, the indicator light flashes slowly when playing music; after the Bluetooth is disconnected, the amplifier board prepares for the pairing, and plays the "Beep" to enter Pairing mode waits for pairing.colour:blackMaterial:Plastic + metalPackage Contents:3 x ModuleNote: In order to improve the performance of the module, it is recommended to work on the amplifier chip and heat sink under the application scenario of more than 20W x 2.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.