Garmin 010-01746-00 Forerunner 935 Running GPS Unit (Black)

Premium GPS running/triathlon watch with wrist based heart rate; Strap material: Silicone; Smartphone compatibility: iPhone, Android, Windows
Offers advanced running and multisport Features in a comfortable watch you can wear all day, and it only weighs 49 grams
Provides elevation changes with a built in barometer; altimeter and electronic compass help you keep your bearings
Evaluates your training status to indicate if you’re undertraining or overdoing it and offers additional performance monitoring Features
Provides advanced dynamics for running, cycling and swimming, including ground contact time balance, stride length and more. Bezel Material: Fiber reinforced polymer