Good to know - Say goodbye to cable clutter and let your peripherals roam free – this ergonomic set is completely wireless - A single nano receiver connects both the mouse and the keyboard, so you'll just need one USB port - The mouse has 6 buttons and a scroll wheel to cover all the basics you need to work efficiently - The DPI switch lets you adjust the mouse's sensitivity on the fly Product Type: Keyboard & mouse set Connection Type: Wireless Overview: Type, Keyboard & mouse set, System requirements, USB port x 1, Connectivity, 2.4 GHz wireless Mouse features: Number of buttons, 6, DPI, Up to 1600 DPI, Scrolling, Scroll wheel, Ergonomic design, Yes Keyboard features: Ergonomic design, Yes, Other features, Battery life: about 314 hours General: Box contents, - Sandstrom Ergonomic SERGOCS25 Wireless Keyboard & Mouse Set- AAA batteries x 2- Nano receiver- Instruction manual, Keyboard dimensions, 42 x 447 x 222 mm (H x W x D), Mouse dimensions, 47.1 x 122.3 x 84.3 mm (H x W x D), Keyboard weight, 750 g, Mouse weight, 85 g, Manufacturer's guarantee, 1 year