The blood pressure monitor adopts a dual user mode, supporting independent recording of the latest 99 measurement data from two different users, helping users easily track blood pressure and pulse according to specific times, and understand their health status.The arm blood pressure monitor has 2 power supply options, and you can directly connect it to a USB cable (included) for use or install a 4 * AAA battery (not included). Please note: The arm blood pressure monitor cannot be charged, so both methods cannot be used simultaneously. You can only choose one of them.The large and bright backlit LCD display clearly shows all measurement values, including systolic blood pressure, diastolic blood pressure, pulse, time, and user, which is very friendly to the elderly.The pressure measurement range of blood pressure monitor is 0-37.3kPa (0-280 mmHg), with an error of+/-3 mmHg; Pulse measurement range: 40-199 times per minute, with an error of+/-5%. Note Please sit still for 5 minutes before the measurement and do not engage in physical activity or eating.Package: 1 * Arm blood pressure monitor, 1 * 22-32cm cuff, 1 * USB cable, 1 * user manual. Please carefully read the user manual and refer to the correct measurement method in the user manual before use to obtain more accurate measurement results. Please allow the measurement results to fluctuate within the error range.