From the Bog Dog team:
Fenix HL18R-T V2.0 is a fully featured, light weight rechargeable trail running headlamp that follows in the footsteps of its hugely popular big brother, the Fenix HM65R-T V2.0 by incorporating 2 primary beams. A white beam for normal conditions, and a warm-white beam to penetrate mist and fog. The light also features 2 x red LED's to protect your night vision.
Fenix's SPORT, bi-directional rotary headband system enables instant tension adjustment on the go, while the headband also features a built-in safety whistle. A sliding lock switch is incorporated into the light head to prevent accidental activation during transport and storage.
HL18R-T V2.0 is powered by a 1900mAh Li-poly battery for excellent run times, recharged via a USB-C socket in the headlamp. 3 x AAA alkaline or Ni-MH batteries can also be used.