How do I start the Smart Blood Pressure Monitor BPM 1600 FITvigo before first use?

Press and hold the "MEM" and "SET" buttons for a few seconds until the display lights up. The Smart Blood Pressure Monitor is now ready for the first full charge of the battery. If the display does not light up, connect the device to the supplied USB cable to charge the battery with your computer and restart the process after a few minutes. Then set the date and time, as described in the enclosed user manual.