Supply voltage DC5-20V, quiescent current is about 15maBoth are 3.5mm stereo jacks, input any channel, both output, input two at the time, then output the mixed sound, the two inputs can input two different audio sources at the time, and plug at the time will not affect each other, the output is also, You can two headphones or two amplifiers at the time.The first-stage operational amplifier is NJM4580, and the second-stage driver is NJM4556A high-current operational amplifier, both of which are imported products with stable low-noise performance.Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on.color:BlackMaterial:ABSPackage Contents:1 x Audio Distributor1 x AdapterOnly the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.