Liquid-filled precision compass and clinometer in one compact aluminum housing. High accuracy - precise readings in seconds. Durable aluminum housing - protects against impact, corrosion and water. Edges at 90 degrees angles for contact measuring. Now balanced for global use. Optical adjustment for reading. Clinometer scales: 0 ± 90°, 0 ± 150 %. Global model without declination adjustment - Suunto Tandem 360PC/360R G.