Featurer: The perfect companion for those who work from home, this mouse shaker simulates mouse movement and prevents your computer from going to sleep while you work or play. The mouse mover requires no drivers. No annoying software installation, simple and easy to use. After plugging into the computer, long press the power button to turn on the device, and then short press to adjust the mode. It still works fine even without a mouse. Highly Compatible: This mouse shaker can work with for Win7/8/10/for Mac/for Linux systems. Steps for usage 1. Plug into the computer 2. Long press the power button of the device 3. Short press to switch key mode (a total of three modes) Material: Plastic+metal colour: black Package Contents: 3 x USB 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.