- Material:high-quality ABS. - Size:Small--74*64*76mm,Big--102*94*137mm. - Backlight:with bright LED for easy reading day or night. - Adjustable mounting bracket and visible lubber line for easy direction reading.Mounts easily to almost any flat surface with included EVA foam sticker or screws. - Easy to Use:The scale reading on the red indicator line indicates your heading,it is High Accuracy and always keep you on the right direction. ATTENTION please: Please adjust the compass in the horizontal direction so that it can rotate freely, and keep away from other magnetic objects that may interfere with its function. Service Guarantee: commit to provide 100% after-sales for all customers.If you have any dissatisfaction, please let us know and we will reply within 24 hours."

There is several differance between big size and small size:1,big size has cap on top;2,Corlor is a little different between big and small size(no effect on function).The picture shows is detail of big size. Big and Small.There are 2 size.The bigger one more suitable for Boat,Truck,Marines,which size is 4×3.7×5.4 inch.The small one is more suitable for car or other small space dashboard,which size is 2.9×2.5×3 inch.But you can still choose the big one on your car as you like. Backlight compass.Two power cords can be connected to power supply 12V light or vehicle or sea ship vehicle dashboard.The incandescent light suitable for night trips. High Accuracy sea marine compass.Fast response,high sensibility,keep balance individually,precision engineering reading display.Built-in accuracy compensator to easily adjust for deviation,which makes the reading more precisely. Easy to read and adjust. Mounted easily on the dashboard of car,truck,boat or other smooth surface.2 way to mount,EVA foam sticker or screws. The shell of this Boating Compass is made of high quality ABS plastic material,durable,corrosion resistant.It can working under extreme weather condition, so that it is very suitable for sea boats or marine vehicles.

Mounting Type: Wall Mount. Special Feature: Adjustable. Material: Plastic. Brand: Begator. Date First Available: April 2, 2021. Best Sellers Rank: #45,681 in Sports & Outdoors. Customer Reviews: 4.0 out of 5 stars 148 ratings 4.0 out of 5 stars. : B08PB1Y88P. Size: ?Small. Manufacturer: ?Begator. Material: ?Plastic. Color: ?White. Brand Name: ?Begator. Package Weight: ?0.1 Kilograms. Item Package Dimensions L x W x H: ?4.33 x 3.15 x 2.95 inches.