The Nitecore TUBE RL is a lightweight, compact key chain light the packs a bright red light for it's small stature. Red light has the amazing effect of allowing the human eye to retain night vision, keeping the pupil dilated so you can see more in the dark which makes the TUBE RL perfect for star gazing, navigation and reading maps at night. This compact red flashlight also comes with a built-in rechargeable battery and micro-USB charging port so you never have to worry about how to charge your light or waste money on disposable batteries. Use it to see more clearly in fog, take it star-gazing or use as an emergency signal - you're sure to find tons of uses for this incredibly convenient easy-to-carry light! <br /> <br /> <b>Specifications:</b> <br /> Output / Runtime:13 Lumens / 1 hr <br /> Battery Type: Built-in rechargeable li-ion battery <br /> Dimensions: <br />--- Length: 2.22 ((56.5mm) <br />--- Width: 0.83 (21mm) <br />--- Height: 0.31 (8mm) <br /> Weight: 0.32oz (9g)(with battery) <br /> Waterproof: IP65 <br /> Impact Resistance: 1.5m <br /> <br /> <b>Features:</b> <br /> Lightweight and handy design <br /> Featuring high power red LED <br /> Integrated intelligent Li-ion battery charging circuit (micro-USB charging port) <br /> Built-in rechargeable Li-ion battery provides runtime up to 1 hour <br /> Single switch offers easy one-handed operation <br /> Constructed from durable Polycarbonate materials <br /> Dual metal key ring connector withstands up to 77lbs weight(35 kg) <br /> Impact resistant to 1.5 meters <br /> <br /> <b>Contents in Package: Nitecore Tube keychain light, key ring</b>