Microsoft Wireless Mouse Bluetooth Monza Gray Colour: Monza Gray Number of Total Buttons: 4 Pointing Device Connectivity Technology: Wireless Pointing Device Wireless Technology: Bluetooth Product Type: Mouse Scroller Type: Scroll Wheel Miscellaneous Device Supported: Desktop PC Notebook Physical Characteristics Colour: Monza Gray Depth: 100.3 mm Height: 38.4 mm Weight (Approximate): 78 g Width: 58.2 mm Pointing Device Movement Resolution: 1000 dpi Number of Total Buttons: 4