This device keeps a regular daily check on your blood pressure in the comfort of your own home the upper arm monitor is fully automatic and tracks the average readings of both the mornings and evenings of the last seven days designated as a medical product it is also aa grade approved by the british hypertension society and the european society of hypertension2 x 60 memory spaceslarge easy to read lcd displayarrhythmia detectiontime and date displayfits upper arm circumferences of 9 to 13