Coromose 2.4GHz 1600dpi Wireless Cordless Optical Mouse USB 2.0 for PC Laptop(Grey) 2.4GHz 1600dpi Wireless Cordless Optical Mouse USB 2.0 f PC Laptop Mini adapter Plug and play Wireless transmission, the longest sensing distance up to 10-15 meters Portable and weight light, very convenient to carry and store Power switch for save power