I'm a new levo sl owner. I was using a garmin 520 with their hrm strap until I somehow lost my 520. So now I'm attempting to use the Garmin hrm with MC. I can get it to pair but if I don't keep my Apple se phone within an inch or so, it disconnects and it's a new strap with a fresh battery. And it will instantly connect back up if I bring the phone close again looking at devices in the MC app. If I look at the phone's bluetooth connections, it says the strap is connected and it doesn't show it being disconnected like this with distance. But in the MC app under devices it will not stay connected more than a few seconds unless very close to the strap. I did pair it with the bike on and my app, motor, etc are all up to date. I didn't want to buy a new Garmin but looks like I might have to do that or maybe but a different strap. I could not find a definitive answer about if the Garmin strap is compatible but seems like some people are using it sucessfully.