Very light and easy to use, this device is designed for both left and right handed use. It has a wide range of useful applications from checking the color of clothes to the ripeness of fruit while shopping. Just simply select one of the 3 variable volume levels and hold the front of the unit against almost any surface - paper, cloth, wood, plastic, etc and the color will be spoken. Comes supplied with clip on cover to protect sensors when carried in pocket and an earphone which turns the speaker off to avoid disturbing others. Uses 1 x 9v alkaline battery (not included).