The Lezyne LED KTV Pro Drive Rear Light is compact, aero-post compatible safety light featuring a Daytime Flash mode. Its co-moulded construction is super light, yet durable and has an IPX7 waterproof rating. Up to 19.5 hours of runtime (6.5-hour increase) with highly improved optics. Its Wide Angle Lens offers over 270° of visibility. The KTV Drive Pro Rear provides up to 75 lumens (Daytime Flash) and five output/flash modes. And it features an integrated USB stick for convenient cable-free recharging.Lezyne LED KTV Pro Drive Rear Light FeaturesMax Lumens: 75.Weight: 45g.Max Runtime: 19.5 hours.Recharge Time: 3 hours.