All sockets are stereo 3.5mm, with one input and two output channels that deliver the same signal. When two inputs are used simultaneously, the output produces a mixed audio signal. Both inputs can receive different sound sources at the same time and operate independently without interference. The output supports connecting two headphones or two amplifiers simultaneously. The first-stage op-amp is NJM4580, and the second-stage driver is NJM4556A high-current operational amplifier. Working voltage: DC 5-20V. Color: black. Material: metal. Package includes: 1 x Stereo Mixer. Only the above package content is included; other items are not part of this product. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the actual product. Measurement may vary by +/- 1-3 cm.