FRONT: Compact, durable cycling light with a machined aluminum body. It features built in cooling fins and cutouts 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's available in five colors (Black, Silver, Red, Blue, Purple) and securely straps to a variety of handle bar shapes and sizes. Note: This light is not being distributed within the German market. SPECS MAX LUMENS: 500 WEIGHT: 84g MAX RUNTIME: 20 hours RECHARGE TIME: 2:30 hours REAR: Compact, aero-post compatible safety light with two bright LEDs. It features a super lightweight, yet durable co-molded construction that is IPX7 (waterproof) rated. NEW -- Up to 20 hours of runtime (seven hour increase) with highly improved optics. Its Wide Angle Lens offers over 180 of visibility. The KTV Drive rear provides up to 10 lumens and five output/flash modes. And it features an integrated USB stick for convenient cable-free recharging. Also available in pairs. Note: This light is not being distributed within the German market. SPECS MAX LUMENS: 10 WEIGHT: 54g MAX RUNTIME: 20 hours (in Femto mode) RECHARGE TIME: 3 hours