Snap in the battery, and put a wrap of tape around it to secure it. Loop the Kevlar® lanyard through your nose cone eye screw, or tie it to your shock cord, and tuck the MicroBeacon into your rocket on top of the chute. You're ready! The MicroBeacon is not loud; if it were, it would have to be bigger and heavier. However, because of the warbling tone it generates, it's easy to hear under most conditions. Ever notice how far away you can hear a cell phone ring? Same principle!