Welcome to our store! 2 IN 2 OUT: The mixer amplifier features 2 outputs and 2 inputs, with a 3.5mm jack design. When 2 audio sources are input, the output will be mixed sound effects. PRACTICAL DESIGN: 2 inputs can receive 2 different audio sources simultaneously, and the inserted connectors do not affect each other. The output is also the same; you can connect 2 headphones or 2 amplifiers at the same time. BROAD COMPATIBILITY: The input is compatible with DVD, CD, MP3, TV, mobile phone, computer, tablet, guitar, bass, etc. The output is compatible with speakers, reverbs, AV receivers, rear amplifiers, headphones, etc. PLUG AND PLAY: This stereo mixer audio distributor is easy to use, no installation of special software, applications, or drivers required, plug and play. ALUMINUM ALLOY SHELL: The stereo audio mixed distributor adopts an excellent aluminum alloy casing, which is lightweight, difficult to corrode, has good heat dissipation, and a long service life. Item Type: Stereo Mixer Audio Distributor Material: Aluminum Alloy Model: AU 202 Interface: Approx. 3.5mm/0.1in Operational Amplifier: njm4580 Driver: njm4556a 1 x Stereo Mixer Audio Distributor Satisfaction Guarantee: Customers are our top priority. If you encounter any problems with the product, please contact the seller immediately. We strive to provide satisfactory customer service.