Scroll wheel - move through documents and webpages quickly Comfort and portability - compact design to fit in your hand and go wherever you go Plug-and-go nano transceiver - leave the nano transceiver plugged in when you’re on the go or stow it in the mouse Comfortable in either hand - use your mouse to your left or right hand, ambidextrous design makes it comfortable either way 6+ months battery life - work with less interruption with longer battery life Dimension: 5.81 x 10 x 3.82 cm Brand Microsoft Product Dimensions 5.81 x 10 x 3.82 cm; 90 Grams Batteries 1 AA batteries required. (included) Item model number U7Z-00003 Manufacturer Microsoft Series U7Z-00003 Color Black Form Factor Ambidextrous Voltage 1.5 Volts Power Source Battery Powered Hardware Platform Laptop Battery description AA Are Batteries Included Yes Lithium Battery Packaging Batteries packed with equipment Item Weight 90 g