i can tell when my blood pressure feels high  or low.  last year i bought a wrist monitor blood pressure monitor with 99 memories  one touch operation   automactic inflate with life time warranty.     it runs on batteries that i have not to replace.  2  aaa.    i got it on sale at     c. v. s.  pharmacy.  i love it.   i took it the doctors with me and they were very close.  usualy drugstore like your big ones in your town will have sales on them.  i got mine for less than $ 40.00.  i had  2 other ones, the kind usded electric and would inflate on your arm with the cup  and both of them went bad  in short time.  and were hard to use  and awarkward to use.   i thought.  i like my wrist one.  cause you dont have to be medical to use it.

good luck

God bless

nanadee