Ultracompact, ultra light less than 5 cm long and only 27 g emergency headlamp to always have with you. Always ready to use, can be stored with batteries lithium CR 2032 for 10 years. White lighting 26 lumens up to 29 m allows you to move around easily in the dark. For emergency situations, the red LED allows you to be seen from a distance 300 m for 30 hours. Locking onoff switch designed to prevent accidental operation. Resists extreme temperatures 30 C to 60 C. Waterproof to 1 m for 30 minutes IP 67.