Product Review

Sufficient Brightness
The beam distance is up to 20+ feet when it is on the brightest setting. The illuminating area is wide enough for running or working.
With adjustable focus function, it also can be used for precision work (watch or clock repair) or auto repairing or craft work that requires attention to detail.

Comfortable to Wear
Straps are comfortable to wear and easy to adjust, and the battery compartment that is covered with rubber seal as well as front plastic plate holding the lamp do not cause any discomfort.
Also you can wear it on many kind of hats, like baseball cap, construction hardhat or some motorcycle or cycling helmets.Light weight. It weighs only about 7oz/200g.

Weatherproof.
The IP44 rating means it is protected against splashing water from all angles.

Versatile
Extremely useful for:
Reading anywhere
Unloading the car
Walking the dog
Working on the car
Unplug some cords in a dark area
Nighttime Running, Bicycling, Hiking, Camping, Fishing ,Caving, Hunting, Boating,
Mining, Climbing, Household Searching, Construction Lighting

Package Content:
1x Fightinggirl waterproof headlamp
1x Charger
1x US Wall Charger
2 x 3.7V 18650 Rechargeable Batteries