ITEM NAME:1pc Bluetooth Power Amplifier Module XH-A251 5W* 2 Dual Channels Descriptio n Description: Bluetooth power amplifier,.Audio Output: 5W 2 Dual Channels. Bluetooth Power Amplifier Module 1. Audio input: Bluetooth input (0-10m). It also has a two-channel output with a maximum power of 5 W 2. Power Connector: Android Micro USB.