Top features: - Optical sensor offers responsive control - Comfortable to use and easy on your wrist Optical sensorThe 1000 DPI optical sensor delivers an accurate and smooth experience. Make use of the six buttons and enjoy total control over your computing.Comfortable to useThe mouse feels great in your hand and also helps to support your wrist, reducing strain. It also has a reduced power consumption so its batteries last for up to nine months - no more time and money spent replacing batteries every few months.Using a reliable 2.4 GHz wireless connection, the mouse makes it easy to control your computer without the hassle of cables trailing across your desk.