4-input and 2-output mixed audio distribution output: Four output devices are connected to 2 speakers or headphones with 3.5mm AUX audio interfaces at the same time, and the operational amplification brings a more realistic live sound experience. 4-way input can be selected at the same time/one can be selected, 2-way output can be selected at the same time/optional, mixing/distribution/multi-way combined output, optional. 4-way AUX input port connects to the host/computer/player and other audio source devices, and 2-way OUT output port connects to the sound card/active speaker/headphone/amplifier. The shell is made of high-quality metal, frosted industrial, sturdy and durable, delicate and durable, fast heat dissipation to ensure normal heat dissipation of internal parts and longer service life. Silicone foot pads are used around the bottom to stabilize the use of the device. Support hot plug, plug and play, save the trouble of installing drivers, no system limit, fast processing speed, smooth operation. Plug Type:US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines and so on./EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage:AC100-240V Color:Black Material:Metal Package Contents: 1 * Audio Switcher 1 * power adapter 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.