The clock serves its purpose and measures the pulse entirely without welding. Eigendlich would the chest with my anatomoschen deviation (mild pectus excavatum) cause problems. He funtioniert yet (just a little bit deeper, attach almost on the belly). Sometimes there are near electrical appliances interference of data transfer between clock and chest strap. Whether open up foreign chest straps as interference source I could not try nich.
Apparently the Sanitas SPM 21 identical to Beurer PM 26, but this clock was here at the time of purchase ~ 8 cheaper.
I give the clock 4.49 stars, because of the thing with the electrical equipment. The price is for the functionality and processing fine.
