Brand ‎Logitech Product Dimensions ‎3.81 x 9.91 x 6.1 cm; 75.12 Grams Batteries ‎2 Lithium Metal batteries required. Item model number ‎910-002235 Manufacturer ‎Logitech Series ‎Wireless Mouse M185 Colour ‎Swift Grey Processor Count ‎1 Computer Memory Type ‎DDR3 SDRAM Wireless Type ‎802.11a Number of USB 2.0 Ports ‎1 Power Source ‎Battery Powered Hardware Platform ‎PC Operating System ‎Linux Average Battery Life (in hours) ‎12 months Are Batteries Included ‎No Lithium Battery Energy Content ‎0.46 Watt Hours Lithium Battery Packaging ‎Batteries contained in equipment Lithium Battery Voltage ‎100 Volts Lithium Battery Weight ‎5 Grams Number Of Lithium Ion Cells ‎1 Number of Lithium Metal Cells ‎1 Item Weight ‎75 g