Explanations and Features: * The Booster automatic arm gauge is easy to use. * Illuminated display and large readings. * Classification of readings in color. * Heart rhythm detector. * Cuff circumference size is 22 - 36 cm. * Memory capacity of 60 readings for 2 users, as well as the average of all values saved for the previous 7 days. * Date and time display - automatic shutdown - battery change indicator.