Portland Design Works' Radbot 1000 Taillight shines brightly to enhance your visibility when the sky turns dark. It boasts a 1-watt LED with three modes and a precision reflector to notify others of your presence. And, the Radbot includes mounts for a rack, seatpost, seatstay, and backpack, so you can put it wherever you want. - 1.0 watt red LED made by Nichia - 3 Modes: zZz pop, Cornea Blitz and Rock Steady for up to 30 hours run time - Large precision reflector - Includes both Stayputnik quick release and Rack mounts - Weatherproof exterior for all season riding - Runs on 2xAAA batteries (included) - Weight: 62 g (2.2 oz) - Lifetime PDWarranty