Ph D Fitness Overview Perfect for the Multisport user & serious runner.... The G1 GPS can be used for any outdoor sport with speed from 1mph to 123 mph. Get all the essential heart rate features with this good-looking & simple-to-use training computer. RS300X is compatible with S1 foot pod (NOT Included) & G1 GPS sensor (INCLUDED), so you can combine heart rate with speed & distance. Only then you can truly make sense of your training & be sure it s worth all the effort. Helps you to train at the right intensity with personal training zones Displays how many calories you’ve burned Tracks your latest 16 training sessions & your last 16 weeks of training Transfers training data to polarpersonaltrainer.com with optional Polar Flow Link.