???Easy to Support 3 Device ???Rapoo Bluetooth 3.0, 4.0 Wireless 2.4G technology wireless mouse support 3 devices, two devices by Bluetooth and the third through 2.4GHz USB dongle. With one mouse, you can switch device easily by simple button. Please note you cannot control three devices at the same time. ???Silent Design??? This silent wireless mouse features 90% noise reduction. Quiet clicks eliminate your worry of bothering others and allow you to better focus on your work. Enjoy peace and quiet during your browsing and working experiences. Anti finger-print and sweat proof outer shell, breathable and moisture absorbing, fresh and cool. Suit for Laptop/Desktop/MacBook/NoteBook/ChromeBook. ???Ergonomic & High Precision Optical???Symmetrical shape designed for left or right hand, flat radian fits the curve of the hand. Fatigue release, suitable for all day use. High precision optical engine, without a mouse pad using the mouse on various surfaces like leather, cloth, paper, desk, wood or resin. ???Convenient & extended battery life??? Rapoo implements low-power technology and a power-saving design with power switches to extend battery life, 9 months battery life under normal conditions. Portable compact size, easy to carry on for office and business trips or travel. ???One year Warranty & 30days Return??? We are the designer and manufacturer for Rapoo mouse and keyboards, we have been engaged to providing the best products to our customers. All the products are hassle-free 30days return and refund or replacement and one year Warranty.