Originally Posted by
Oostal
I am very happy with my Polar CS500. Gives me reliable hrm, cadence and speed data. Everything wireless. I train often in the evening under high tension power lines, with a LED lamp next to the computer and haven't noticed any interference problems.
I use a Polar HRM that uses the same strap as the CS500 and I have found one issue, BT headsets(Motorola S9-HD) that can use A2DP function buttons interfere with each other, hitting the play/pause button resulted in my HR being displayed at 300 something for a second and every once in a while the HR will bleed over into the headset and cause a BEEP BEEP BEEP in sync with my pulse.