The COROS RUN POD 2 offers an in-depth review of your running data to provide the tools necessary for improving your form. Improved GPS accuracy, indoor measurements and offering advanced running data. Simply sync the POD 2 with any COROS GPS watch (excluding PACE 1), clip it to the back of your waistband or on your shoe, and start running to receive your personalized data. The POD 2 tracks beneficial information such as effort pace, efficiency, stride length and height, left/right balance, and more. With all of this info at your fingertips, it’s only a matter of time before you start to adjust and improve your form. Clip-on device that measures your running dynamics Running dynamics include: Effort Pace: what your pace is no matter the elevation Temperature: records ambient temperature Left/Right Balance: balance between your strides Stride Height: how high you get off the ground Stride Length: distance between each stride Stride Ratio: ratio of stride height to stride length Ground Contact Time: measured in milliseconds Cadence: steps per minute Connects via BLUETOOTH® Compatible with any COROS GPS watch (excluding PACE 1) POD water resistant up to 3 ATM (30M) Rechargeable battery and charging dock Battery: 28 hours with a single charge, 168 hours with rechargeable charging dock Weight: 5.6g (without attachment clips)