This boat compass is a multi-functional marine vehicle compass.Customers can use the correction tool included with this product to fix the compass deviation, or connect the compass own power cord to the power source on the car or boat to power the LED light of the compass.For reasons such as observation of the driver and the convenience of a habit, this compass is specially designed to reverse the magnet of the product.The direction of the compass is the direction of movement. Specifications: Compass Material: ABS Plastic Color: Black Package Weight: Approx. 11.7 oz (320 g) Length: Approx. 5.39 " Width: Approx. 9.3 cm / 3.66 " Package Includes: 1 x LED Light Boat Compass 1 x Magnetic Displacement Adjustment Plectrum 1 x Gum Paper 2 x Screws.

Note: The boat compass should be placed in a horizontal position.At the same time, you need to keep a certain distance from the magnetic object to avoid the illusion of the magnetic needle.Specific methods are as follows: 1, from iron net > 10 meters; 2, high voltage line > 55 meters; 3, 20 meters from car or aircraft; 4, strong magnetic objects, such as various magnets, external magnetic speaker> 10 meters 5, weak magnetic objects, such as magnetic snap> 0.5 meters How to use: 1.Fix the compass in a wide area of the car or hull, keep it in horizontal position until you use it still 2. Compass screws are used to secure the compass to the desired car or hull position; Keyblade is used to adjust the NS, EW holes under the compass chassis to adjust the problem of the compass; Green film is a double-sided adhesive tape used for adhesive in automotive or hull position.