Be careful with purchasing blood pressure machines from retailers such as Walmart! These machines are not accurate! I purchased one years ago and then replaced it with a new one. I took the new machine to our doctor’s office to check it against their machine. They use a mechanical machine that is very accurate! The new Walmart machine measured 15 points higher on both values! This lead us to overmedicating and going to a cardiologist for expensive tests! First check your blood pressure on the machines located in your pharmacy area’s before going to your doctor! Our doctor recommended purchasing a blood pressure machine from a medical supply house. Some insurances may cover this cost. Thankyou. James and Hamsa Sasse. GodWhoisGod.com