Hydra 30

The Hydra 30 Tail Light is a neat and powerful light that is perfect for any biker running a dropper post. It c be installed underneath just about any saddle when mounted on the saddle rails. This means you can drop your saddle to your heart's content without having to worry about crushing the light. A simple twist-lock disengages the light body from the mount making it a breeze to remove from the bike when not in use.

Emitting up to 30 lumens means that you won't go unseen on those commutes back and forth from the trailhead. It can also be mounted on a seat post or frame by using the included O-Rings.
 
Specifications:
LED type: COB 
Battery: 400mAh
Max Lumens: 30 lumens
Charging Time: 1.5 hours
Run Time: 2-5 hours
IP65 Waterproof
Weight: 65g
Charging Port: USB-C
Material: Anodized Aluminum Body
Included mounts: Saddle rail brackets
Modes & Run Times:
Steady (2h)
Slow flash(5h)
Quick flash(4h)