Purchased for use with my Concept 2 rower which comes with a PM5 monitor. Pair tethering offered as a few options - I suggest using ANT+ as it seems faster. One note - I'm 6ft 1" and 210lbs, chest 44-45" and the strap fits me. but very close to the end of the setup. I suspect the strap will stretch a bit over time, but if you're taller than me, be aware it may be too small. Also, the strap attachment mechanism seems pretty flimsy, I could possibly see it breaking down over time. That hasn't happened yet though, so at this price point this device gets the job done for less than half the cost of competing Polar and Garmin devices - hence it deserves a 5 star rating for now, hopefully it holds up for the long haul! Edit 03/02/2020: Well, my first review was unfortunately a bit premature. After some more use, I found this monitor extremely inaccurate - sometimes reading speeds of up to 30 bpm are too fast. Maybe it's just a defective device. but he goes back and is not inclined to attempt a replacement. Instead, I bought a Wahoo Tickr for just $10 more, which turned out to be right.
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