Hecto Drive 500XLCompact, durable cycling light with a machined aluminium body. It features built-in cooling fins and cut-outs for side visibility. Its single LED design provides up to an impressive 500 lumens of output and eight output modes - including a Daytime Flash mode. Runtime has increased by 2.5 hours for up to 20 hours. Charging is simple with an integrated cable-free USB stick. It securely straps to a variety of handlebar shapes and sizes.KTV Pro DriveCompact, 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 Hecto Drive 500XL/KTV Pro Light Set SpecificationsHecto Drive 500XLMax Lumens: 500 lumens.Weight: 84g.Max Runtime: 20 hours.Recharge Time: 2.5 hours.KTV Pro DriveMax Lumens: 75.Weight: 45g.Max Runtime: 19.5 hours.Recharge Time: 3 hours.