Daffodil WMS325 Wireless Optical Mouse 2.4GHz - Cordless 5 Button PC Mouse with Scrollwheel and Adjustable Sensitivity (MAX 1600dpi) - For Laptop / Netbook / Desktop Computers - Supported by: Microsoft Windows (7 / XP / Vista) and Apple MAC (OS X +) - Battery Powered (2xAAA Inc.) Nano Receiver - Small enough to be left plugged in during transport 2.4GHz Radio Frequency Connection - Reliable operation from up to 10m 1600dpi Optical Sensor - Works on any non transparent surface Adjustable DPI - On the go adjustment of cursor sensitivity for precise control Ergonomic 5 Button Design - Comfortable use for right handed operators