Explorer Compass Features. 2 3/4" Easy to Read Direct Reading Dial. Easily Installed, Fits 3.75" (9.53 cm) Mounting Hole. 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. Approx. Shipping Weight: 1 lb (454g). Protective Cover: E-50-C. Replacement Parts: Light Assembly: 12 Volt: EX-0005-2; 6 Volt: EX-0099-2. Notes: All compasses come standard with 12 volt lighting. 24 volt lighting option is available. Some custom built OEM models may have different lighting. Contact Ritchie for replacement lighting.