The Lezyne Strip Drive Pro Rear 300 Lumen LED Light is extremely powerful. It has a light and durable co-molded lens/body construction, is waterproof and is compatible with aero or round seat posts. Five market-leading, ultrahigh-output LEDs deliver up to 300 lumens. Mode Memory function returns to selected mode after turning off. Nine combined lumen and flash modes, including the extremely visible 300-lumen Daytime Flash mode. Enhanced lens with built-in side visibility. Integrated cable-free recharging USB stick.