Robust in construction, the mobilemouse uses premium hard-wearing materials with a die cast frame, ensuring that the mouse will stand up to the most demanding of commuter or business use. The eclipse mobilemouse features impressive technology & understated yet sophisticated good looks The low profile Scroll Ball allows for effortless 4-way scrolling with audible click feedback. Scroll up, scroll down, scroll at 45° or even through 360°. Easy to use with no cleaning required. 1600dpi laser technology ensures smooth operation on a variety of surfaces. Fully wireless, the mobilemouse utilizes 2.4 G Hz technology & a nano-dongle for an unobtrusive appearance & rock solid connection at all times. mobilemouse features flexigrip, an adjustable back leg which affords flexibility & in hand comfort, allowing you to achieve your preferred optimum glide height. 4 button 2.4 G Hz wireless; Up to 30ft / 10m range Scroll ball (allows 4 way 360o scrolling) Flex Grip two stage height adjustment Nano dongle, storable inside mouse 1600dpi laser