Dark Green Plastic Survival Binocular and Compass Three & A Half Inches Of Survival Hang your keys on it for now. Some day it could save your bacon. Our little dark-green plastic survival combo measures 3-1/2" x 1-1/2" x 3/4" and has pop-out 3X binoculars, a compass, a little covered signal mirror, and a fold-out white LED light (battery included and replaceable). On a 1" chain with a split ring.