The sensor catches the position of the switch box with a magnet; Features: Gyromatic structure that allows for all directions; Sensor ball rotates up and down to left and right • Magnet can be used with both the N and S pole; Compatible with 3 types of magnetic switchboxes; Graduated horizontal; Specifications: Size: 3.7 x 2.0 x 1.2 inches (95 x 31.5 mm); Weight: 1.5 g); Material: Polycarbonate, Neodymium magnets.