50 Lumens in white LED Modes: constant or day-safe flash Includes two sets of durable, stretchy attachment bands Integrated hooks hold attachment bands securely in place Secure attachment, easy to detach for security purposes Powered by three AAA batteries, included Dimensions: 1.6" x 2.7" x 1.5" | 40mm x 68mm x 38mm Weight: 2.25oz | 64g