There is no need to repeatedly plug and unplug the four devices, and the entertainment and office can be switched freely. Three USB devices (keys, mice, etc.) and a audio devices share four hosts. Support 4K@30Hz ultra-clear image quality. ABS+PC shell, wear-resistant and high-temperature resistant, more stable for long-term use. Mini design without compromising desktop space. The working status can be known at any time. The indicator light design makes it easy to check the working status. Type: Switcher Function: three USB devices (keys, mice, etc.), a audio devices share four hosts Switching : button switch/wire control button switch Resolution: 4K/30HZ Drive: plug and play without drive Colour:black Material:ABS+PC Size:14.7 x 7.4 x 2cm Package Contents: 1 x Switcher 4 x -compatible Cable 1 x DC Power Cable 1 x Wired Button 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.