Compact, aero-post compatible safety light with Smart Connect compatibility. Smart Connect allows for customization and/or control of the output modes through the Lezyne LED Ally phone app, and it can link with compatible Lezyne LED front lights. Its co-molded construction is super light, yet durable and has an IPX7 waterproof rating. Its Wide Angle Lens offers up to 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 for up to 19.5 hours of runtime.