Verbatim 97540 Red 3 Buttons 1 x Wheel USB 2.0 RF Wireless Optical Mini Travel Mouse Hand Orientation: Both Hands Power Supply: 1 x AAA Battery Operating System Supported: Windows 7 Windows Vista Windows XP Package Contents: 97540 Mouse Nano Receiver 1 x AAA Battery Quick Start Guide Parts: 1 year limited Labor: 1 year limited Electrical Outlet Plug Type: Plug Type “A� (USA, Canada, Mexico, Japan)