1. Manufacturer 2. High quality and competitive price 3. USB power amplifier 6 channel 4. OEM is welcomed Product DescriptionBrand ... or off.2, 2 road microphone, there are two microphone input; Microphone 1 take strong shearing functions, microphone 2 no strong ... function does not control).5, LED lights, automatic vision priority sound, with short circuit, overload, delay protection function.6, power ...