Discovery Adventures Head Lamp is an inexpensive entry-level model with considerable features. In fact, with all the function that needed is one, only need 1 AA alkaline battery with 4.5 hours full power running time. It is the best cost-effective headlamp now you could find nowadays.
The light-focusing systems have consisted of either a lens or a reflector
Sensor activated
Waterproof
Provides both a focused beam for long-distance and a homogenous spill-beam for up-close reading
