This is the Scubapro Compass FS-2 Wrist Mount Compass Features: Scratch-resistant and durable oil-filled polycarbonate case. Highly luminous dial for easy reference in low light conditions. Side view window for easy and accurate navigation. The FS-2 compass provides a unique tilt angle of up to 35 degrees, making it easier to read and operate in almost any position. With a floating magnet separate from the compass rose, the FS-2 has greater operating freedom than conventional compasses. This means you can use the same compass for both Northern and Southern hemispheres, making it the perfect navigation instrument for traveling divers.