Dimensions: 3.75L x 3.25W x 2.5H in.. Powered by 2 AA batteries (not included). LED light. Runs up to 1 year. Motion activated. Both powerful and portable, the Dorcy International Wireless Motion Sensor LED Night Light is an indispensable, go-anywhere source of illumination for emergencies and low-lighting atmospheres. Whether you need a little extra visibility doing some delicate work or just a back-up light source in case the power goes out, this light serves you well. The unit is outfitted with both a motion-sensor and a photo sensor, automatically turning on and producing a bright flood of light in 180-degrees that services up to 350 square feet. Requires 2 AA batteries (not included).