Cesert Ergonomic Bluetooth 3.0 Wireless Optical Laser Mouse for Android iOS Tablets,Macbook Air Pro Acer Chromebook and All Laptop (Rose Gold) Effortlessly connect to any Bluetooth PC, laptop, or tablet computer | Opitcal laser allows for quick response, precise movement, and smoother tracking Powered by two AAA batteries (not included); on/off switch helps you conserve power | Bluetooth 3.0 interface is backward compatible with all older versions Ergonomic design makes this device the ideal travel accessory for your laptop | Features left and right mouse buttons, a scroll wheel and a DPI switch Power Saving - On/off switch on the bottom helps to conserve power. Powered by 2 AAA batteries (not included). Ultra Slim Design w/ Bluetooth Function - Its lightweight, slim design make it perfectly for travel, easy to put in your laptop bag or pockets. 3 DPI levels save operating space even on the road.Smooth surface design enables comfortable use with either hand. Stylish appearance and various color selection: Green, Pink, White and Azury. A separate USB receiver is not needed for Tonor TM Portable Ultra Slim Bluetooth 3.0 Wireless Optical Mouse.