There are two specifications to choose from: no voice or backlight; With voice and backlight; Name: Fully Automatic Arm Style Electronic Blood Pressure Monitor Display: Digital liquid crystal display Measurementmode: oscillometric method Measurement range: Pressure:0-299mmHg; Pulse:40-200 times/min Accuracy: static pressure:0.4kPa(3mmHg); Pulse:within5% Resolution: 0.1kPa(1mmHg) Power supply: Dc6v (1.5Vfour AAA batteries) Storage temperature and moisture:Temperature: 2oC~55C; Moisture:10%~95%RH Using temperature and moisture:Temperature 10~40; Moisture:30%~85%RH Weight: About450g(exclude batteries) GREEN Measurement results: Normal blood pressure, the background is automaticallydisplayed in Green YELLOW Measurement results: Mild hypertension, the background automatically shows Orange RED Measurement results: Severe high blood pressure,the background is automaticallydisplayed in Red