The Microsoft Wireless Mobile Mouse 3000 v2 has an optical sensor and includes 2.4 GHz wireless technology to provide a reliable connection with a range of up to 9 metres. The USB mini receiver can be hooked up to your computer or tucked away in the mouse for easy storage. The Wireless Mobile Mouse 3000 v2 works on a single battery for up to 10 months use. The battery indicator will let you know when power levels are running low. Plus, with a bidirectional scroll wheel and side grips, the Wireless Mobile Mouse 3000 v2 ensures comfortable, intuitive handling for all your applications.