US Delivery Only. The Signal safety light allows the user to be visible from a distance. It emits a red light, in either continuous or flashing modes. The 180 degree multidirectional beam guarantees optimum visibility from up to one kilometer away. The elastic band and clip allow many options for attachment: on the headband of another headlamp, around the arm, on a pack, etc. Versatile blinking red safety light resists extreme temperatures: - 30 °C to + 60 °C (-22° F to +140°). The Petzl Signal Safety Headlamp is durable, with LED technology, and is waterproof down to -1 meter. It is compact and lightweight, weighing 22 grams including batteries.