Usage Tips:, NJM4580 and NJM4556A high-current analog operational amplifiers are used to easily drive various earphones, and the sound is warm and durable. With common ground isolation Dual-channel two-way input and mixed output Two-way output can drive headphones or active speakers. All sockets are stereo 3.5mm, with 1 input and 2 outputs the same. Simultaneously input 2 channels, the output is mixed The two inputs can input two different audio sources at the same time, and plugging in at the same time will not affect each other. The output is also, you can connect two headphones or two power amplifiers at the same time. Made of materials, stable and low noise. Type:Mixer Colour:Black Material:aluminum alloy Package Contents: 1 * Mixer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.