Your runs take you from the roads to the trails, to the mountains, and often back again. With all of the great features of the Original APEX, combined with the added Pulse Oximeter, Altitude Advisory and Touch Screen Technology, the APEX Pro is the most versatile COROS watch yet.The APEX Pro offers 40 hours of full GPS battery life – a 14% increase over the original APEX. Titanium frame, Sapphire glass screen and 100m waterproof rating provide ultimate durability. At just 59g including the watch band, you can take the APEX Pro on just about any adventure you can dream of.With 24/7 blood oxygen monitoring with Altitude Mode, APEX Pro follows the VERTIX as the only watches to provide hourly acclimatization evaluations. Your watch will let you know when you should keep climbing, or when you should head back down to a lower altitude.Supported Workouts: Run, Indoor Run, Trail Run, Track Run, Hike, Bike, Indoor Bike, Pool Swim, Open Water, Triathlon, Gym Cardio, GPS Cardio, Ski, Snowboard, XC Ski, Ski Touring, Multisport, Strength, Training.