This is the Blinky 1 Tail Light made by Planet Bike

• 300% brighter eXtreme LEDs
• 3 Super-bright red LEDs provide 220 degrees of visibility for up to 1 mile
• Flashing and steady mode
• Ultra compact case is weatherproof, light weight and durable
• Seat post and seat stay mounts included
• Up to 100 hours of run time of 2 N batteries (included)