This is a beautiful patina solid brass reproduction of an antique pocket sundial with an internal magnetic compass. The top of the sundial has a curved scale which is used to set your local latitude angle. The magnetic compass allows the sundial to be oriented North. The sun's shadow cast by the sundial's vane marks the local time. The sundial comes with a removable lid, which can be placed on the bottom of the sundial when open. The sundial vane is hinged to lay flat for compact storage. When closed, the sundial measures 2 3/4 inches (7 cm) in diameter, 1 1/8 inches (2.85 cm) tall, and the sundial weighs 7.3 ounces (207 grams).