Explorer Compass Features: * 2 3/4″ (70 mm) Easy to Read Direct Reading Dial * Viewing is adjustable to 30 / Heel angle to 25 * Easily Installed w/4 mounting screws provided, Fits 3″ (762 mm) Mounting Hole. * Built-in Compensators to Easily Adjust for Deviation * 12v Night Illumination * 100% Repairable * Exclusive 5-Year Ritchie Warranty Notes: Comes standard with 12v lighting. 24v lighting option is available. Some custom built OEM models may have different lighting.