It provides an accurate reading quickly and with no constraint. Detects body movements or interferences that may cause errors. Adjusts inflation values adapting to the latest 3 results. Checks and warns if the cuff is not being worn correctly. It can be used either with AC adapter or AA alkaline batteries. In compliance with the ESH IP2010 protocol, (European Society of Hypertension). Adjusts inflation values adapting to the latest 3 results.