TONOR Bluetooth 3.0 Wireless Mouse Ultra Slim Portable Optical Mouse 800/1200/1600 DPI, Blue (Blue) Double-Sided Board design prolongs lifespan and enables accurate operation of the mouse. Tonor offers technical support for after-sale service, If you are not satisfy with our product, simply send a product inquiry message to Tonor,(make sure you don't reach Amazon FBA Customer Service instead) and we will take care of it. Easy installation- upgraded one-button (Bluetooth connection button on the bottom) hassle-free Bluetooth pairing. Compatibility - Enables use with your Bluetooth-enabled PC,Windows tablet for optimal accuracy across multiple devices. Plug-and -play connectivity.(iPad must be jailbroke) 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.