Depth:1.4' Height:3.7' Movement Detection:Optical Movement Resolution (dpi):1600 Number of Total Buttons:3 Package Type: Pointing Device Connectivity Technology:Wireless Pointing Device Wireless Technology:Radio Frequency Product Color:Gray Scroller Type:Scroll Wheel Weight (Approximate):1.94 oz Width:2.3' Wireless Operating Frequency:2.40 GHz Maximum DPI:1600 Color:Black Tracking Method:Optical Type:Standard Mouse Model:M501 Connectivity:Wireless