.... Do not buy, otherwise probably threatened just a long way of vexing.

The Pulse worked initially quite well. But after about 2 weeks this was always unreliable, in the end nothing more indicated.
Cleaned lens, updated software the clock, skin degreased, clock reset bracelet times fixed times looser, etc.- does not help. I have enough. GPS satellite now also takes 5 min. To I may start times.
Much promised ultimately an unreliable to non-functioning product at great expense.
I run 3 times a week and wanted to 5-6km work on a 10km run. Now I'll probably still have to again pick up the chest.