While definitely not durable, for 1$ they are practically disposable. Also available are 3AAA flashlights and a ball cap light.
The straps are adjustable to about toddler size to large adult (Yes I have a big head).
The light adjusts to 135 degrees to illuminate what is needed. Also you can remove the headstrap and probably attach it to a surface. I'm thinking a nice light for a tacklebox or toolbox.
They run on two cr2032 batteries. Replacement batteries probably cost as much as the units.
As a note when I grabbed one of my headlamps to compare them it would not turn on. Fresh batteries resolved the issue. That reinforced that these are perfect for a backup light.
You are ugly and your mother dresses you funny.
The units where purchased by the author.
Also you are a source of CO2 emissions. You might want to stop that.