Microsoft 1850. Device interface: RF Wireless, Movement detection technology: Optical, Recommended usage: PC/notebook. Colour of product: Purple, Form factor: Ambidextrous, Receiver type: Nano. Wireless range: 5m. Power source: Batteries, Battery type: AA, Battery life (max): 4320h. Windows operating systems supported: Windows 7 Home Premium, Windows 8, Windows 8.1, Windows RT, Mac operating systems supported: Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion