How can I measure my pulse?

Why does the heart rate indication differ from the actual heart rate when using the hand pulse sensors?

4855 Cardio Motion BT - Hand pulse sensore cables too short

10000 CardioPace 5.0 NorsK

Which heart rate belt can I use with the devices?

Why doesn't my heart rate monitor pair with my fitness device?

How do I connect the heart rate belt to the fitness device?

4871 Cardio 5.0

11002 CrossPace 5.0 NorsK

4870 Cardio 4.0

18014 Push-up grips NorsK

11003 CrossPace 7.0 NorsK

75000 Body Screen TX - Product description

4860 Cardio T3

General