Two bright LEDs for visibility from behind and from both sides. This is a serious tail light that doesn’t need to flash to get you noticed by traffic. Simple operation. It’s either on or off.
The LEDs protrude backwards providing side lighting and light that bounces off of the twin reflectors for 220 degrees of visibility.
Up to 60 hours of visibility from two AA batteries.
Mounts to your rear rack, so your rack cargo does not interfere with rearward visibility.
Also see the Busch & Muller DToplight XS Senso Bike Tail Light — it’s the same tail light, but it can turn itself on and off automatically when required by the lighting conditions.