Explorer Compass. Explorer Compass Features, 2-3/4″ Easy to Read Direct Reading Dial, Compact Low-Profile Design, Quick Push-Button Removal of Compass Module for Storage and Security, Choice of Colors, Internal Green Night Illumination, Built-in Compensators to Easily Adjust for Deviation, Scientifically Matched Sapphire Jewel & Hardened Steel Pivot Dial Movement, Powerful DirectiveForce Magnets for Fast Heading Lock-on, Movable Sun Shield, High Temperature Composite Construction for Extended Operating Range, 100% Repairable,