Unfortunately, I cannot give any information about this. But I don't recommend the belt because after half a year of regular use, it becomes distorted and the contact points for the measurement no longer lie completely on the skin. As a result, the pulse is no longer measured. I now only measure directly at the wrist with my watch. The pulse readings are always correct at the wrist because I have already compared it with another pulse watch.

I can't give any information about compatibility either. However, I agree with Joesie's answer that the strap warps extremely quickly. I haven't had this phenomenon with Polar in 10 years. I think the best way to find one is to go to the Suunto homepage and look for products that are compatible with your watch.