Product Name :Bluetooth Digital Amplifier Module Working voltage : DC: 8~24V Bluetooth version :5 Transmission distance: 15 meters (visual unobstructed) Number of channels: two channels (stereo) Output power (@1KHz): 16W x 2 @12V 4 ohm 10W x 2 @12V 8 ohm 15W x 2 @16V 8 ohm 20W x 2 @20V 8 ohm 30W x 2 @24V 8 ohm (requires heat sink) Adapter speaker (30W~150W) 4 ohms (8~12V power supply) 8 ohms (8~24V power supply) 16 ohms (8~24V power supply) Module protection mechanism: reverse power protection Short circuit protection Self-recovery overheat protection Instructions After the power 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 power 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 power amplifier board prepares for pairing, and plays the "Beep" to enter Pairing mode waits for pairing. colour: black Material: Plastic + metal Package Contents: 4 x Module Note: In order to improve the performance of the module, it is recommended to work on the power 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.