The Lezyne KTV Pro Smart 75 Rear Light is a 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. This light provides 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 KTV Pro Smart 75 Rear Light SpecificationsKTV Pro SmartMax Lumens: 75 lumens.Weight: 45g.Max Runtime: 19.5 hours.Recharge Time: 3 hours.