Featuring a C4 LED, this lightweight unit offers three digitally controlled brightness levels. It also has an indicator that shows remaining battery power, and its 50,000-hour LED never needs replacing. Includes adjustable straps for a comfortable, secure fit, and three AAA batteries. IPX4 water resistant and 2 m impact-resistance tested. 1 3/4"H x 2 11/16"W x 2 3/8"D. Yellow.