LP Digital Blood Pressure Monitor , Balance Wrist and Portable , High Accuracy Readings with Easy-to-Read Backlit LCD,Suitable for the elderly , hypertension , heart disease and so on. [Digital Blood Pressure Monitor] High accuracy reading with easy-to-read backlit LCD [Balance Wrist and Portable]Easy to use and comes with an instructions and hard case [User] Suitable for the elderly who are in patients with hypertension or heart disease especially [Memory function] Store measurement values automatically machine will store pressure and pulse number everytime after measurement,at most 99 groups of number. Working with 4 AA Batteries (batteries not included.)