Features:
*The Battery can continue to run 140 hours.
*Silica Body with velcro back, it able to attach on any negative velcro.
*Waterproof but not for diving.
*Blink / On modes.
*Battery CR2032 included(disposable/one-off battery, which can't be changed or replaced.).
*Can be used as helmet lamp, or to Identify your teammates or for survival.
*Completely Waterproof Design
*Weight: 40g