Ritchie - B-51 Explorer Compass - Bracket Mount - Black - B-51. Explorer Compass Features: 2-3/4" Easy to Read Direct Reading Dial Adjustable and Removable with Bracket and Thumbscrews 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 Exclusive 5-Year Ritchie Warranty Protective Cover: None Approx. Shipping Weight: 1lb (454g). Notes: Comes standard with 12V lighting. 6 & 24V lighting options are available.. Some custom built OEM models may have different lighting. Contact Ritchie for replacement lighting.