Blood pressure monitor?

[Herlich emanuell]

I have a feeling that something is wrong with my blood pressure. I have a lot of stress on work and in the evening my blood pressure feels way too high. I would like to control it constantly with a blood pressure monitor.
Which ones are good and what should I pay attention to when buying such a device?

 

[GreyFox7]

TBH, You'd probably get a better answer on WebMD or seeing a real doctor.