type: rechargeable left handed wireless vertical mouse connection: dual connection-2.4g wireless(with usb receiver) and bt 4.0 battery: rechargeable 1000mah polymer li-ion battery(under 8 hours/day condition, at a single full charge, last for a week) keys: all key silent-left/right click, scroll wheel, forward/backward and dpi button resolution: 800/1200/1600/2400/4000dpi(shift in-fly) weight: 115g/4.06oz dimension: 102(l)*88(w)*68(h)mm/ 4.02(l)*3.46(w)*2.68(h)inch | Delux M618zd Wired+2.4g+bt5.0 Wireless Ergonomic Mouse, Iron Grey