The Logitech M185 Wireless Optical Mouse is a great device for any computer user, & as Logitech are the global market leaders for these devices, you are also guaranteed absolute reliability.A mouse to be reckoned with! Benefitting from a one-year battery life, the Logitech M185 has a sleep mode & on/off switch to conserve power. With no software required for installation, you are able to plug in the Logitech M185 & use this clever device immediately! in addition, long range of 2.4 GHz of wireless connectivity means you experience virtually no delays or drop-outs & super-fast data transmission. The comfortable, contoured shape allows an ergonomic design suitable for long periods of use. Compatible with PC desktop computers, laptops & notebooks, the Logitech M185 Wireless Optical Mouse is ideal whether at home or on the go.