Specifications are provided by the manufacturer. Refer to the manufacturer for additional explanations. Basic Product Type: Mouse Movement Detection: Optical Colour: Black Brand Name: Lenovo Pointing Device Connectivity Technology: Wireless Pointing Device Wireless Technology: Radio Frequency Number of Total Buttons: 3 Pointing Device Host Interface: USB Ergonomic Fit: Symmetrical General Information Product Type: Mouse Manufacturer Part Number: 4Y50R20864 Manufacturer Website Address: http://www.lenovo.com Manufacturer: Lenovo Group Limited Product Name: Essential Compact Wireless Mouse Product Line: Essential Brand Name: Lenovo Interfaces/Ports Pointing Device Host Interface: USB Miscellaneous Device Supported: Notebook Computer Physical Characteristics Weight (Approximate): 50 g Colour: Black Height: 32 mm Width: 56 mm Depth: 98 mm Pointing Device Movement Detection: Optical Movement Resolution: 1000 dpi Pointing Device Connectivity Technology: Wireless Pointing Device Wireless Technology: Radio Frequency Number of Total Buttons: 3 Ergonomic Fit: Symmetrical