Turn your penlight or flashlight into a headlamp!
How to use the headset attachment set:
Simply attach the 3-inch "quick-release" connector cable to your flashlight or penlight handle (where you would normally attach the LED head). Next, fit the LED head to the headset piece. Then connect the longer headlamp cable to the 3-inch cable. It is recommended to attach the power unit (flashlight or penlight handle) to your belt, or you can keep it in a pocket.
To turn your headlamp on/off, simply connect or disconnect the two cables. The "quick-release" connector fitting linking the two cables makes this easy.
This Picture shows how you can keep the whole setup on your head when using the headset attachment set with a penlight (as the power unit).