MEMBERSHIP
Earn up to 10% back in rewards. Learn more. Join Free.
The Serfas Cosmo 30 Lumen Rear Bike Light provides you with the rear visibility you need for urban adventures.
30 Lumen Output
Micro USB Rechargeable
Five Settings – Solid Mode (High / Low), Flash Mode (Daytime / High / Low)
Highly Adjustable Mounting System
270 Degree High Visibility Design