Disappointed by this monitor that I have not had time to go back, unfortunately for reimbursement. After checking with the cardiologist the data is false by two points at the second digit. Example, 14/8 8, so second figure is wrong systematically to above colon compared to the voltage tap doctor. For the price it's a shame. I regret my purchase because it was really to check the voltage for daily medical monitoring since software keeps records in order to communicate them to the doctor and there problem, because it's wrong. So buying useless and lost :-(