I have a ReliOn from WalMart and it seems to be accurate. It has the arm cuff. No matter what brand/style a person has, take it with you to the doctor's office at least once a year to compare with what their monitor is registering so you know you are comparing "apples to apples". If you are getting unusual readings on your home device, another reason to take it to the doctor's office to see if it's you or the monitor that is causing it.