The%20Sighting%20Compass%20helps%20you%20make%20precise%20navigational%20readings%20while%20keeping%20an%20eye%20on%20the%20trail%20in%20front%20of%20you.%20Adjustable%20declination%20and%20glow-in-the-dark%20features%20provide%20accurate%20readings%20day%20or%20night.%20Keep%20around%20your%20neck%20or%20attach%20to%20gear%20with%20the%20breakaway%20lanyard.%C2%A0Features%3AClear%20Navigation%20-%20Liquid%20filled%2C%20adjustable%20bezel%2C%20index%20lines%2C%20and%20orienting%20arrows%20keep%20you%20headed%20in%20the%20right%20direction.Sighting%20Mirror%20-%20Allows%20for%20precise%20bearings%20and%20doubles%20as%20an%20emergency%20signal%20mirror.Declination%20-%20Adjust%20the%20declination%20with%20the%20included%20tool%20to%20improve%20accuracy.Night%20Visibility%20-%20The%20bezel%2C%20waypoints%2C%20index%20line%2C%20magnetic%20needle%2C%20and%20orientation%20arrows%20glow%20in%20the%20dark.Rules%20%26amp%3B%20Ratios%20-%20Edges%20have%20inch%20and%20millimeter%20rulers%20with%20ratios%20for%20use%20on%20any%20map.Extended%20Base%20Plate%20with%20Magnifier%20-%20Easily%20read%20map%20details%20and%20plot%20route.Clinometer%20-%20Measure%20slope%20angles.%C2%A0Specifications%3ADimensions%3A%204.25%26quot%3Bx3.95%26quot%3B.75%26quot%3BWeight%3A%202.8oz