Logitech ERGO M575 Wireless Trackball for Business, Black

Logitech ERGO M575 for Business, Black – Keys 5 (Left Right-click, Back Forward, Scroll-wheel with middle click) Scroll wheel 2-way 400-2000 DPI Logitech Advanced Optical Tracking Connection wireless USB(2.40GHz, Bluetooth) 1xAA battery included (Battery life: up to 24 months) Dimensions (WxHxD) 100x134x48mm Weight 145g