Here's what other sites are saying:
Description of Petzl Signal Blinking Safety LightVersatile blinking red safety light.No mountain stands a chance against these bad boys.Multidirectional performance safety light ensures you are seenCan be used in blinking and constant lighting modes Visible for 1000 m 180 visibility Lasts 120 h in blinking mode and 40 h in constant lighting mode ReliableResists extreme temperatures - 30 C to 60 C -22 F to 140 Durable LED technology Waterproof down to - 1 m Multi-purpose and easy-to-useFeaturesCompact and lightweight 22 g including batteries Integrated clip and adjustable strap included Numerous attachment possibilities on the head, on a helmet, around the arm, on a pack, etc. Simple to use switch Stable regardless of attachment methodClip and tabs on the attachment plate Certification CE 2 lithium CR2032 batteries included Waterproof down to - 1 m Weight 22 g including batteries Two lighting modes blinking and constant Integrated clip, removable and adjustable elastic strap included 3-year guarantee
- US Outdoor Store
The Petzl Signal Red Safety Light is a versatile blinking red safety light that can be seen for 1,000 M and can be worn on a band like a headlamp or clipped onto your hat, arm or backpack.