Specification:Description:This product is l550, which is a professional multi-functional marine . Users can use the correction tools attached to this product to correct the deviation of . Because of the driver\'s observation convenience and habits and other factors, the product specially turned the magnetic steel of the product, the of the product pointed to the direction of the car forward. (opposite to conventional products)Features: Pivoting for car and boat. Great for boat, marine boat, truck, , etc. and navigation. Easy to read dial. mounting bracket and visible lubber line for easy direction reading. Comes with mounting fittings to fix the on car or boat. It is made of high quality plastic material, sturdy and for time use.Specification: Material: ABS(Main part of )Color: Black Product Model: LC550 BlackSize: Approx. 86 x 72 x 64mm / 3.4 x 2.8 x 2.5in Core Diameter: 4.8cm/1.9inWeight: Approx. 78.8g Product Application: Outdoor travel , car , Marine navigation , Gift Package List: 1 x 2 x Screws 1 x Pick 1 x Adhesive 1 x ManualNote: 1. This is specially designed for driving & boating navigation. Thus the reading is totally opposite to normal . For example, when you are facing NORTH while the is placed in front of you, the reading shows \"N\" to you and \"S\" pointing north direction. The reading facing you is the correct direction that you are facing, that is \"N\". 2. Please never let the soak in water and keep it away from metal.