Lezyne KTV Pro Smart Rear Light

The KTV Drive Pro Smart Rear is a compact, aero-post compatible bicycle taillight equipped with our Smart Connect wireless technology, allowing the light to be quickly programmed and customized by the companion LED Ally phone app.
The app also allows for pairing with a compatible front light for one-button operation of both lights simultaneously. 
When linked to the app, the Smart light is programmed to increase brightness when you slow down on your bike, acting like a brake light.

Its co-molded construction is super light, durable, and IPX7 waterproof. The Wide Angle Optics lens offers over 270° of visibility and provides up to 75 lumens with six output modes.
It features an integrated USB stick for convenient, cable-free recharging and can run for up to a maximum of 19.5 hours on a full charge.