Description: 500-1000 (auto) CPI USB Wireless Optical Mouse. 2.4GHz Wireless Optical Technology, USB interface. Absolutely comfortable design for your hand touch. Low-Battery Indicator, indicator lights reminds you to change the batteries. Works maximum within 10 METER distance. Power saving technology. High precision capacity scrolling can enhance your searching speed. Very Easy to Install, only plug your USB receiver then you can use. Compatible with operating system: Windows and Mac, All Laptop or Desktop. Mini USB receiver is included, which can be stored neatly inside the mouse when not in use. Package included: 1 x Black 2.4GHz USB Optical Wireless Mouse 1 x Mini Receiver (Hidden in the Mouse Bottom).