Pairing together two of Cateyes more powerful urban lights, this light set features the powerful Volt 100 Front Light which can illuminate the darkest alleys & streets with its constant 100 lumens or ensures your seen with a powerful 150 lumen pulse mode. Paired with the Volt 100 is Cateyes Rapid X Rear Light which combines a new, powerful LED strip with a wide range of flashing modes & a long run time of up to 30 hours on a single charge. The low battery auto save feature of the Rapid X automatically swaps to flashing mode from constant when your battery is low for up to an hours more safe cycling.