Electronic4sale High Qulity Wireless Optical Mouse Mice for Pc/laptop 2.4ghz Red+nano USB 2.0 Receiver Brand new black wireless optical mouse. Ergonomic design,high accuracy,high quality,modern design. 2.4GHz wireless transmission up to 10(30 ft.)meters operating distance. Nano USB receiver ,receiver could be hidden into mouse when not using. Power by: 2 x AAA battery (not included)