(1). Bidirectional Switch:2 In 1 Out Modes: 2 computers sharing 1 monitor.1 In 2 Out Modes: 1 computer sharing 2 monitors (only one monitor display. By button, switching to the other monitor). (2)4K x 2K Resolution:Supports a multitude of video resolutions, including 4K, 1080P, 720P, full 3D, HD audio and etc. (3) Premium Quality:Provide stable proformance and fast heat dissipation. (4) Long Distance Transmission: standard cable: Input cable length up to 1.5m, Output cable length up to 1.5m. No lag, No loss of picture or sound quality. Colour:Black Material:plastic type:B:4K 120HZ Switch Package Contents: 1 x Bi-directional Switch 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.