2.4 g wireless optical mouse ultra-thin handle, notebook accessories. All applicable models: laptop Perfect radian, fingers most comfortable support and super nicely. Energy-saving design: super power-saving, thoroughly break the infinite mouse cells can only use 10 days or months of ills. Revolutionary creative design, general home office use two batteries, can use a year or so. DPI free switch. bout 113 mm long, about 59 mm wide, about 20 mm high.