MAIN OVERVIEW FEATURES: Pointing Device Connectivity Technology: CableMovement Detection: OpticalMovement Resolution: 1600 dpiNumber of Total Buttons: 3Scroller Type: Scroll WheelErgonomic Fit: SymmetricalPointing Device Host Interface: USB 2.0Color: RedHeight: 1.50" (38.10 mm)Width: 2.20" (55.88 mm)Depth: 3.70" (93.98 mm)Weight (Approximate): 45.4 gPackage Contents: iMouse S8R - USB Illuminated Retractable Mini Mouse Quick Start Guide Device Supported: Desktop ComputerEnvironmentally Friendly: YesEnvironmental Certification: WEEECountry of Origin: ChinaLimited Warranty: 1 Year