Keep moving with a transceiver that stays in your mobile PC when you go and a mouse that works on more surfaces with Microsoft Blue Track technology! Product Description: Microsoft Wireless Mobile Mouse 3500 - mouse Device Type: Mouse Colour: Lochness grey Orientation: Right and left-handed Dimensions (Wx Dx H):5. 7 cm x 9. 5 cm Connectivity Technology: Wireless - 2. 4 GHz Wireless Receiver: USB wireless receiver Movement Detection Technology: Optical Buttons Qty: 3 Movement Resolution: 1000 dpi Features: Rubber side grips, battery indicator, on/off power switch, Microsoft Blue Track Technology Battery: 1 x AA type OS Required: Apple Mac OS X 10. 2, Microsoft Windows XP SP2, Microsoft Windows 7, Microsoft Windows Vista Microsoft Certification: Compatible with Windows 7 Manufacturer Warranty: 3 years warranty