COROS POD 2, Watch Sensor Accessory, Accurate Indoor and Treadmill Distance Measurement, More sensitive Real-time Pace, Improves GPS data, Clip onto Shoes or Waistband only works with COROS watches

Was sceptical due to the cost but there was no need to be as the metrics it provides was worth the cost.Purchased specifically for treadmill use and it functions extremely well alongside my peloton.I’ve also used it on track and what can I say apart from ‘WOW’. A huge amount of additional running metric data provided which has highlighted areas for improvement for additional gains. You don’t even know you have it on as it’s so small and lightweight.Was simple to set up and pair as well as use with good battery life.Not had it long enough for a durability viewpoint but it does say it can be used in the rain , however, I don’t think I will use it when wet, especially on shoe.

Got it to measure accurately my treadmill runs.Works well and pleased with it

Don't normally disregard all the good features and give 1 star for a single problem, but when the problem is that it doesn't stay on your clothes after you've secured it (and checked it's secure) prior to running, that's the sort of problem which might stop someone else from making the same mistake! £99 which could quite literally be down the drain... somewhere.