About this item High Accuracy --- Digital car compass built-in accuracy compensator to easily adjust for deviation, which makes the reading more precisely, improve its accuracy and decrease its errors Bracket Mount Design --- Bracket mounted 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 Multi-function --- This professional grade military dashboard altimeter compass will always lead you in the right direction. Fit for car, watercraft, boat, caravan and truck and anywhere the beaten track takes you Navigation Compass --- Boat compass suction is easy to install and visible lubber line for easy direction reading. The pointing direction of the compass is same with the way forward of the vehicles.Made of high quality material, Waterproof, corrosion resistant Great Balance & Portable --- The car gyroscope compass possessed fast response, high sensibility, keep balance individually, precision engineering reading display. With compact size, this compass is very portable, and it is easy to install or use