Reflective LED safety armband for nighttime activities. Provides visibility in dusk and nighttime activities and keeps you away from potential dangers. With three lighting modes: fast flashing, slow flashing, and steady light. Ideal for outdoor activities such as running, jogging, dog walking, camping, fishing, cycling, and hiking. It has an adjustable length ranging from 29 to 36 cm. Operates with 2 CR2032 batteries (included).