Have you ever dropped a setscrew in the grass in the dark, and went fumbling around looking for it, holding your red-light flashlight in one hand, thinking you may never see that setscrew again? Put both hands to work with the OrionRedBeam LED Motion Sensing Headlamp! In addition to finding lost parts, this versatile red-light LED flashlight works great when you need to set up astronomy gear and need both hands to attach everything together. An elastic adjustable head strap fitsall sizes, and provides a comfortable grip to hold the flashlight in place.But this isn't just any ordinary hands-free flashlight. In addition to the adjustable brightness red LED light (5%, 10%, 50%, 100% illumination), there is a completely hands free mode that allows you to turn the light on and off with the wave of yourhand! Simply wave your hand approximately 4" in front of the LED, and a sensor detect the motion, turning the light on and off. And if you're worried about moving your head around and objects in front of you triggering the sensor when you don't want itto, fear not! The sensor is focused to 4" away, so nothing in the distance will trigger the light. And our favorite advantage of the sensor -- no more fumbling for the power button in the dark when it's cold and you've got thick gloves covering yourhands.Perfect for reading star charts while in the field at the lower brightness setting so you won't disturb your night vision, and for walking around your campsite or packing your equipment up for the night when using the brighter settings. Powered by threeAAA batteries (not included), and adjustable to aim straight out or angled downwards towards the ground when worn. The RedBeam LED Headlamp is a must have accessory and you'll quickly wonder how you did without it!