Color: blue*1PCS Product size: 11.7 x 9.5 x 6.5cm Storage temperature: -20°C~50°C Storage humidity: 15%~90% Operating temperature: 10°C~40°C Operating humidity: 40%~85% < p>Display: LCD digital displayp> Measurement method: Pulse scan method/Oscillometric method Measurement range: Hypertension/Hypotension: 20mmHg~2 80mmHg Pulse: (40~200) times/min Accuracy: ±3mmHg (±0.4kPa) Pulse: ±3% of reading Voltage: 3V Weight: about 370 grams each. Requires 4 AAA batteries (not included!) Charging station design, tri-color backlight reminds you if your blood pressure is healthy. There is also a voice broadcast feature. The #1 brand recommended by cardiologists, this is a clinically proven wrist sphygmomanometer for cuff replacement. Simplify your blood pressure monitoring by knowing your own health anytime, anywhere Easy to use home blood pressure monitor on a portable wrist monitor, 11.7 x 9.5 x 6.5 centimeters, raise your wrist to heart level for accurate readings in seconds Monitor your health