Scientific ergonomic design encourages healthy neutral "handshake" wrist and arm positions for smoother movement and less overall strain. Silent Click: soundless design for the right and left buttons, help you a quiet atmosphere without disturbing others. 800 / 1200 / 1600 Resolution Optical Tracking Technology provides more sensitivity than standard optical mice for and precise tracking on a wide range of surfaces. Rechargeable: Built-in durable durable lithium rechargeable battery, with a charging cable. No more need for extra AA battery. Compatible with most system including Windows 7 / 8 / 10, XP, Vista and Linux. Fit for Notebook, PC, Laptop, Computer. Type: Mouse Wireless technology: 2.4G Wireless distance: 10m Key number: 6 Resolution: 800/1200/1600dpi Operating cycles: 1,000,000 cycles Battery: 500mah lithium System requirement: Windows 2000/ 2003/ / XP/ Vista/ Win7/ 8/ 10/ OS/ Linux Size: 104 x 60 x 76mm Material: ABS colour: silver grey Package Contents: 1 x Mouse 1 x Receiver 1 x USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.