The ASUS WT300 Wireless Optical Mouse has a compact ergonomic design that ensures comfort even after long hours of use. The symmetrical body is ideal for being held in either the right or left hand. The WT300 has a precision optical sensor with two sensitivity settings. You can easily switch from the default resolution of 1000dpi to 1600dpi by pressing the scroll wheel and the right button simultaneously. The WT300 also has an energy-saving design that provides up to 15 months of battery life. The WT300 also is available in a matte black and glossy white finish.