Usage Temperature and Humidity: 5~40 degree, 15% to 85%RH Operating temperature: 10 ~ 40 degree Display: LCD digital display Measuring method: pulse scanning / oscilloscope assay Measuring range: hypertension / hypotension: 20mmHg ~ 280mmHg Pulse: (40 to 200) beats / min Resolution: 1mmHg (0.1kPa) Accuracy: ± 3mmHg (± 0.4kPa) Pulse: ± 5% Voltage: 3V Power Consumption: 0.01W