Feature:1. Professional multi-function compass, magnetic declination adjustment, high accuracy.2. With 12V LED for easy reading day or night. This compass is and ideal choice for emergencies on board.3. Wide range of applications, suitable for the marine, vehicles, boating, travel, hiking, outdoors, etc.4. The installation is simple and does not require complicated operations, convenient for using.5. Made of premium ABS material, anti-corrosion and durable, can withstand harsh Marine environment.How to Use:Itisinstalledandfixednearthecentralcontroloftheyacht,theredwireisconnectedtothepositivepole,andtheblackwireisconnectedtothenegativepole.Specification:Item Type: Magnetic Compass Material: ABSPerformance:1. The compass structure material should be non-magnetic, and the pointer is made of high-quality alloy material.2.Pointing Error: No more than 1.503. Friction Error: No more than 1.504. WhirlError: No more than 3.505. Temperature Test: Under the ambient temperature of -30 degree C60 degree C, the compass should be without any damage, and the liquid in the sphere should have no change. Package List:1 x Compass1 x Copper Contact3 x Screws