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Serfas TL-ONE Beacon

Very similar to:

Run Time: 80 hours
Bulb: One 1/2 Watt Red LED and Two 5mm Red LEDs
Battery: 2 AAAs INCLUDED

The CatEye Reflex (TL-LD500) combines a CPSC (Consumer Product Safety Commision) approved reflector with 3 ultra-bright flashing LEDs. Rear reflectors are required on bicycles ridden at night. CatEye is the leading manufacturer of reflectors in the world. This is our most versatile light. It mounts to a standard reflector bracket, seatpost, or the included clothing clip lets you attach it to a belt or bag.