Arion Rapoo 7100P 5.8GHz Wireless Mouse With 4D Scroll Wheel Optical Engine Programmable buttons for Laptops Desktops and Tablet- Green Innovative reliable 5G wireless technology provides powerful connection, preventing finterference from other Bluetooth and Wi-Fi devices Rapoo's latest energy saving technology and power switch, battery life up to 18 MONTHS. Can support with a single battery 4D Scroll wheel make scroll up/down, scroll side to side and as a button too Adjustable 500/1000 DPI high-definition tracking engine. Portable, Nano-receiver build-in design Advanced programmable buttons allow to define shortcut to Applications, Office file and Web pages