[. . . ] The measuring accuracy of Braun VitalScan Plus was tested at the time of manufacture and was proven by clinical research in accordance with AAMI/ANSI-SP10. What you should know about blood pressure Blood pressure constantly changes throughout the day. [. . . ] Take off wrist watch and jewelry before fitting the monitor on the measuring arm. While taking a measurement, sit down, relax, keep still, especially the hand of the measuring arm, do not move or speak. Fasten the monitor on the palm side of your wrist, roughly 2 cm below the palm line. At the end of the measurement, a beep sounds and the reading is displayed: Upper (systolic) value Lower (diastolic) value Pulse Otherwise the product will turn off automatically after 2 minutes. If at any time, you want to stop the measurement, press the red start/stop button. After each measurement, the blood pressure monitor automatically stores the reading in memory. Please note that stored data will be erased if changing batteries takes longer than 15 seconds. Repeatedly pressing the memory button will call up one by one all stored readings. To exit the memory mode, turn the device off by pressing the start/stop button. BP 1650: The readings of the last 20 measurements with time and date are stored in memory. The lower display line successively shows date, time and pulse of the respective measurement. The lower display line shows «Time» and flashing digits in the «hour» position. Again, repeatedly push the «memo» button to adjust the minutes. Push button (C) again to adjust the date: The lower display line shows «Date» and flashing digits in the month position. [. . . ] If the product should develop a persistent problem within the warranty period, contact Braun´s Technical Support Center at 1-888-848-2572 for repair or replacement at no charge. Braun reserves the right to replace your product with the most comparable product currently available. [. . . ]