HOW BRIGHT: With LED(50000-hour lifespan), Lumintop EDC01 could pump out up to 120 lumens brightness which only runs with a single AAA cell. Also, support the easy-to-get AAA battery and provides max 36 hours runtime. HOW RELIABLE: Built with the highest IPX8 Waterproof Certification, EDC01 is suitable for continual submersion in water under 6.5ft. Don't worry about accidentally dropped due to ANSI verified Impact Resistance (up to 5ft). HOW COMPACT: Military grade (HA-III) anodized surface, Aircraft-grade aluminum body, lighter than 3 Nickel (weight:0.42oz, excluding battery). Real compact size (2.36*0.57inch) makes EDC01 the best choice of keychain flashlights. SIMPLE BUT FUNCTIONAL: Features three modes. Twist the light head to switch the mode (mid – low - high). To turn the EDC01 on simply twist the light head clockwise to turn on the light. Twist the tailcap counter-clockwise to turn off the light. It is very convenient to connect to the keychain or put into backpack or the pocket. Keep a back-up in the medical and emergency kit. WHAT YOU GET: Lumintop EDC01 keychain Flashlight, Diffuser, Keychain.