Tool free installation. mouse pad can be clamped on your desk in seconds with No DAMAGE TO YOUR DESK. No need to drill holes in your desk. Position your mouse under desk shelf ; essentially expand space for holding a million different things such as your speaker, phone, mouse or . Ergonomic mouse keeps you in body postures for working or reading on computer screen; prevent shoulder, back, and wrist pain and injury from bad postures. You can clip it on your desk surface between 0.65 inch and 1.5 inch thickness, and can be easily installed for either right or left hand users. We DO NOT recommend using on table with edge slope and edge with decorative strip or glass office table. Rotates under the desk and when not in use. Buy 2 to make one keyboard . Weight: 1.2 colour:Black material:plastic size:25*19.5cm Contents: 1*Mouse Only the above content, other are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.