Buy a cheap BP cuff and stethoscope. I have been dealing with HTN and taking Atenolol for the past 14 years. Recently, my BP has been crazy high....160/110 on meds. I just got put on an additional BP med, lisinopril @ 20 mg. Kind of working....kind of. I occasionally get BP readings of 122/70, but average is 140/90. Tonight.....158/106. Anyway, I was taking my BP on our LifePack 15 and was getting inconsistent readings. Took it manually and there was significant differences in the readings. I always trust manual BP over automated. Point is, get a cuff