Qisan 2.4Ghz Wireless Mouse 23MM Mini Ultra Thin 3 level DPI Adjustable Slim Mouse with Nano Receiver Portable Mobile Mice for Notebook, PC, Laptop, Computer(White) Ultra Slim design and plug & play- Tiny wireless receiver (Nano receiver was hidden in the battery place) conveniently slots into your computer's USB port , the thickest part of mouse is only 23MM taking up minimal space. Power Efficient-An On/Off switch and smart sleep mode can be helped conserve power, while its battery indicator light eliminates surprises. Auto sleep after 8 minutes of inactivity for power saving, it can be waken up by clicking any button. DPI Adjustable-This Wireless Mouse has 3 level DPI can be adjusted. 800-1000-1200 dpi can switch freely. Portable and stable Connection-wherever you go, just plug in Mini Receiver and get started.Perfect for work and entertainment in home or office. Universal Compatibility - work with Windows XP, Windows Vista, Windows 7, Mac OS X 10.4 etc.Package Contents:1 x 2.4GWireless Mouse(Not including battery), 1 x Nano receiver