ITEM NAME:50*35*8mm 4.2 Lossless Receiver Module Decoder 5W* 2 Dual Channels Description Description: Bluetooth power amplifier,.Audio Output: 5W 2 Dual Channels. Audio input: Bluetooth input (0-10m). Bluetooth Power Amplifier Module 1. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted.