Description: Bluetooth 3.0 wireless connection technology. Scientific design encourages healthy neutral handshake wrist and arm positions for smoother movement and less overall strain. 800 /1600/2400 DPI Levels -- Easily adjusts the sensitivity of the mouse. Optical technology for precise control. Added Retreat/advance buttons provide convenience when webpage browsing; the choice for internet surfers, gamers and people who work at length at the computer. Specification: Item type: Optical Mouse Resolution: 800dpi; 1600dpi; 2400dpi. Button: 4 buttons and 1 wheel (middle button) and dpi (adjusrable) Wireless Technoloy : Bluetooth 3.0 connection Maximum operating range: 10m Rated voltage /current: 3V/8mA Power supply:2 AAA batteries(not included) Color: Black, Grey Material: ABS Button click life:8 Million times Item size:13x6.4x7.7cm/5.1x2.5x3.0inch Item weight:87g Package size:15.5x8.5x8.4cm/6.1x3.3x3.32inch Package weight:125g(Including the weight of the packaging box) System Requirements: Windows 98/Me/2000/XP/Vista/ Win 7/Win8/win10 or latest Package Includes: 1 Piece Mouse 1 Piece English User Manual 1 Piece Case Note: Desktop computers need to be equipped with a Bluetooth receiver to use. It is not support for phone. Please allow slight dimension difference due to different manual measurement.