Verbatim Wireless Nano Notebook Optical Mouse - Graphite Nano Receiver Small enough to plug in once and leave connected. Wireless Plug in nano receiver and go wireless. 2.4GHz reliability and performance. Nano Slot  Convenient nano receiver storage for when you need it. Comfort Grip- Smooth,contoured design allowsfor comfort and control. Verbatim has been a leader in data storage technology since 1969, and guarantees this product with a limited lifetime warranty and technical support