1. Description USB 3.0 sharing switch is a great solution for sharing. USB devices like USB printer, scanner, external drive,SD/TF card, or other USB device; (2 or 4 computers share one set of keyboard and mouse), and you could freely switch between these 2 or 4 computers by a single push button; 2. FeaturesUP Input: USB 3.0 port*2 ( or 4 ports); Connect to the USB of the computer host ; Down Input: USB 3.0 *3,TF*1,SD*1;Connect to keyboard, mouse, scanner, printer, U Disk,or USB HUB etc. USB 3.0 transmission rate up to 5Gbps; Down compatible with USB2.0/1.1; Support for XP/7/8/10/Vista, Android, OS 8.6 and above; Application scenarios: computers, smart , Android phones, DVR, etc. Support two cards reading at the same time; Material: ABS colour: Black Package Contents: 1 x switch 2 x 3.0USB cable 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.