Built with two powerful 0.5-watt Nichia LED bulbs in red, the Saftey Zone Taillight from Metro Flash defends you and your bike against rear collisions with three eye-catching modes that can be changed with a feather-light touch. Running with two AAA batteries, the Safety Zone offers runtimes of up to 124 hours depending on the mode. The Safety Zone is uniquely designed to be visible from all sides. The Safety Zone comes complete with a backpack clip as well as a seatpost and seatstay mount so that it is easy to secure to your bike or your person. Built to withstand all weather conditions, the Safety Zone carries a lifetime warranty against defects from Metro Flash.Specifications: Two Nichia brand 0.5 watt red LEDs Modes: Flashing/Constant/Chasing Runtime:124 hours seatpost and seatstay mounts Backpack clip Power: two AAA batteries (included) Weight: 60 grams What's in the Box? Safety Zone Taillight, two AAA batteries, seatpost and seatstay mounts Product Description SUPER bright double LED tail light for those who truly want to be seen. Two 1/2 watt LED's 3 unique light settings: Flashing/Constant/Chasing Batteries, Seatpost and Seatstay mounts all included Item Specifications Weight 60g Battery 2xAAA (included) Bulb LED Run Time 124 hours.