1. This mouse jiggler is an perfect companion for those working at home, it simulates mouse movement and prevent computer from going into sleep while you work or play. 2. The mouse mover requires no driver, just plug it into your computer the cursor will start to move automatically. 3. No annoying software installation, easy to use. 4. No need to install software/drivers. It can be used directly after plugging into the computer. Even without a mouse, it can still work normally. 5. Highly Compatible: This mouse jiggler can work with Win7/8/10/for Mac. Most widely-used systems are supported. Colour:black Material:PP+metal Package Contents: 4 x Mouse Jiggler 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.