Specification :

The Suunto Tandem is a liquid-filled precision compass and clinometer in one compact alloy housing
High accuracy - precise readings in seconds
Durable aluminum housing - protects against impact, corrosion and water
Edges at 90 degrees angles for contact measuring
In-built spirit level
Individually calibrated
Lanyard
Optical adjustment for reading Same quality capsules as in the regular PMs and KBs ( see PM-5 and KB-14 for details)