Built-in accuracy compensator to easily adjust for deviation, which makes the reading more precisely, improve its accuracy and decrease its errors, ensuring your driving or sailing safety. With compact size, this digital sea boat compass is very portable, and it is easy to install or use. Waterproof design, fast response, precision engineering reading display. This car dashboard compass can be mounted on deck or dash; allows compass to remain at proper viewing angle. Mid size bracket mount, more stable for navigational course changes. Specifications Main Body Material ABS Color Black Size 5.7 x 5.7 x 5.8cm / 2.24" x 2.24" x 2.28" Package Weight 65g Fitment For Watercraft, Boat, Caravan and Truck Package Included 1 x Compass, 1 x Magnetic Declination Adjustment Plectrum, 1 x Gummed Paper, 2 x Screws, 1 x Manual Book NOTE 1. Taking into account the convenience of the driver's observation and habits, this product deliberately reverses the magnetic steel of the product, and the compass points in the forward direction of the car (the direction of the compass is opposite to that of the conventional compass products, just read the pointer of the product watch core. scale shown); 2. The guide balls from the factory are all accurate guide balls in the opposite direction, and do not need to be adjusted. Only when there is a magnetic field influence when installed on a vehicle or boat, adjustment is required; 3. Metal objects will affect the interpretation of the compass, so try to stay away from vehicles, cameras or other metal objects when positioning or interpreting the direction. Metal interference can affect the interpretation of the compass from 20 degrees to 60 degrees; 4. When storing the compass, pay attention to the storage location, and do not place it in a place full of electromagnetic effects. The magnetoelectric area will also affect the accuracy of the compass; 5. Avoid exposure to sunlight, which will weaken the magnetism of the magnetic needle. NOTE 1. Taking into account the convenience of the driver's observation and habits, this product deliberately reverses the magnetic steel of the product, and the compass points in the forward direction of the car (the direction of the compass is opposite to that of the conventional compass products, just read the pointer of the product watch core. scale shown); 2. The guide balls from the factory are all accurate guide balls in the opposite direction, and do not need to be adjusted. Only when there is a magnetic field influence when installed on a vehicle or boat, adjustment is required; 3. Metal objects will affect the interpretation of the compass, so try to stay away from vehicles, cameras or other metal objects when positioning or interpreting the direction. Metal interference can affect the interpretation of the compass from 20 degrees to 60 degrees; 4. When storing the compass, pay attention to the storage location, and do not place it in a place full of electromagnetic effects. The magnetoelectric area will also affect the accuracy of the compass; 5. Avoid exposure to sunlight, which will weaken the magnetism of the magnetic needle.