UTR Black 2.4GHZ Wireless Cordless Optical Mouse with DPI Switch USB Nano Receiver (For Laptop & PC Desktop) Nano super mini receiver plug and play, resolution frequency (400-1600CPI) conversion built in mini-receiver design Energy-saving techonology 2.4GHz wireless transmission, the longest sensing distance up to 10-15 meters Wireless carrier frequency 2402MHz - 2480MHz 16 wireless working channels, automatic frequency jumping Portable and weight light, very convenient to carry and store Power switch for save power