Portland Design Works' Fenderbot Taillight shines brightly to enhance your visibility when the sky turns dark. It boasts a 1-watt LED with three modes and precision reflector to notify others of your presence. And, the Fenderbot bolts directly to your fender so it's always on your bike. - Bright red LED and precision reflector - Bolts directly to fender to prevent theft - Weatherproof exterior for all season riding - Weight: 62 g (2.2 oz) - Runs on 2xAAA batteries (included) - Lifetime PDWarranty