GoMotion Waist Light For Running, 100 Lumen CREE LED Designed to mount and stay on pack for 1.5 - 2" wide belts w/ or w/out buckles Adjustable beam angle and Two flashing LED tail-lights Powered by 3 AA Energizer batteries located in the external battery pack Customizable three brightness modes: High/Medium/Low (20/24/50+ hours) Fully adjustable two-piece design for quick access in and out of a waist pack/belt; Waist belt sold separately