What’s the difference between Suunto 9 Baro and Suunto 9
The Suunto 9 with a barometer gives you more accurate altitude information because it combines GPS data with barometric altitude information (FusedAlti™). Based on data from the barometer, it also provides outdoor information like sea level air pressure and has a storm alarm. The other Suunto 9 models still deliver altitude information, but they are based on GPS readings.