3 LED lights powered by 3 LR44 batteries on a keychain activated by switch – and can provide enough light intensity for outdoor activities including hiking, walking, mountaineering, camping, backpacking, or navigating a darkened club. Laser engraved with the Heisenberg Uncertainty Principle that has long been a symbol of The Reticent. 2.68" L x

3 LED lights powered by 3 LR44 batteries on a keychain activated by switch – and can provide enough light intensity for outdoor activities including hiking, walking, mountaineering, camping, backpacking, or navigating a darkened club. Laser engraved with the Heisenberg Uncertainty Principle that has long been a symbol of The Reticent. 2.68" L x .56" D