I bought several other blood pressure monitors on 鶹 and all of them are showing inaccurate results... Purchasing this monitor was my last attempt in getting a proper one before giving up an unequal struggle with an onslaught of inaccurate monitors on 鶹. Surprisingly enough, this monitor proved to be quite accurate. My wife compared the readings on this monitor with the professional and highly precise one at her clinic, and was quite happy with the results. If you get this product undamaged, I am sure it will work just fine for you.