The Forerunner 920XT Tri Bundle includes Garmin's top tier multisport wearable and two heartrate monitors, both of which expand the 920XT's versatility by featuring unique properties to recommend them for different training and racing situations. For bricks or races where we're wearing a top to keep the monitor in place against water resistance, the HRM Tri's lighter weight and additional running metrics make it the obvious choice if we're just working out in the pool, though, the HRM Swim is the go to choice for its ability to resist chemicals and its non slip strap. When paired with one of those heartrate monitors andor a power meter, the 920XT's feature list explodes. Notable examples include VO2 max estimates and running form metrics the clever little guy even knows how long your feet are touching the ground during each stride. It also does all the usual bicycle power output mapping and predicts running race times based on info recorded during workouts to make sure you're on track toward hitting your target times for each leg. The rest advisor feature plays a role in this by letting you know when it's time to let the engine idle during recovery periods. Even without the included heartrate monitors, the 920XT offers an impressive array of features. It starts at the biological level, measuring sleep and calories burned, and moves on to the kinetics of training, including all the classics like swim stroke counting, drill logging, distance alerts for running and swimming because who hasn't lost count of laps', and even a metronome. If you don't have a dedicated friend or significant other to follow you around clapping rhythmically during your run, that last feature is especially welcome on frigid winter mornings when the only souls out are you and the specter of your summer race schedule. You've already paid the entry fees, and the Forerunner 920XT makes sure your engine is on track to being able to cover the cost come race day. The display is bright and...