ITEM NAME:DC 5v wireless digital mini bluetooth amplifier module audio receiver board kdTE Feature: 1. Working voltage:DC 5V 2. Output power:3W+3W 3. Speaker type:3W*2 4-8ohm 4. Mounting Hole:3.0mm Package Included : 1 x 3W+3W Wireless Bluetooth 4.0 Audio Receiver Steady Digital Amplifier Board.1 x 3W+3W Wireless Bluetooth 4.0 Audio Receiver Steady Digital Amplifier Board. Output power:3W+3W.