★High Performance :This Bluetooth Power Amplifier Board entitled with high performance according to strict rule ,the high costeffective amplifier module can use with Bluetooth 4 . 0 receiver amplifier card This digital amplifier board made of materials in high quality supports 18650 battery power ,which can keep long service life so that you can use for a long time ★Easy to Install :AMP board's installation is simple ,which does not require particularly complicated operations .The high quality amplifier module is manufacrured via precision craft by many experts ★USB Charging :This XH A153 Bluetooth power amplifier board adopted USB charging mode ,which can be connected with charger ,power bank ,computer for charging .The design is easy to use in the practical life ★Size & Package :This Bluetooth power amplifier board is a great amplify audio parts with 5W+5W maximum power ,it measures 93 x 42 x 25mm ,the size of the installation hole distance is approximately 86 x 35mm ,which is suitable for DIY speaker