Product Details:

With Swivel Lens.
Waterproof For Use in Inclement Weather.
Lightweight.
 
This Hard Hat Head Lamp is a multi-purpose battery-powered head lamp for use on safety caps or worn on the forehead.
This hands-free lamp gives you an extended viewing range with a swivel lens that focuses light up to 90° to either side.
Lightweight to reduce neck strain and waterproof, so it may be used in inclement weather conditions.

Easy on/off button.
Uses AA batteries, included.