1) LED keychain with a whistle or a mountaineering clasp 2) Turn the switch on its cap 1) LED light with a whistle or a mountaineering clasp or a compass2) Turn the switch on its cap3) shock proof and water resistant 4) Battery life: 300 hours of continuous light 5) Battery: 4 x ag36) More energy efficient and 3 times as bright as normal bulbs

LED Keychain with a Whistle or a Mountaineering clasp