The Clip On Marker is available in 2 L.E.D. versions: Red and Green. Good for all types of personal safety applications. Clips on to back pack, biycycle seat, hiking stick, ski pole or just about anything you can think of. It has been designed to be Flexible, lightweight, and affordable. The push-button power switch also allows you to switch to flash or glow mode and when not illuminated the reflective material is still highly visible. Built to be shock & weather resistant while providing up to 1 mile visibility at night with its 100,000 hour L.E.D. life