Trichromatic aberration, high clear image. No power supply and software drive needed. 4 standard "Y-Pb/cd-Pr/, L-Audio-R", 3 in 1 out. Convenient operation, just the relative button "1, 2, 3" when you want to use one of the four connected devices. Easy connection, simply connect 3 audio & video devices (such as for , , , DVD) to the "Input 1, 2, 3" connectors while your TV to the "Output" connector. size:15.5 x 11 x 4cm Material:Aluminum alloy colour:black Package Contents: 1 * RGB Switcher 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.