Color: White*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% Display: LCD digital display Measurement method: pulse sweep method/oscillometric method Measurement range: hypertension/hypotension: 20mmHg~280mmHg Pulse: (40~200) times/min Accuracy: ±3 mmHg (±0.4 kPa) Pulse: within ±3% of reading Voltage: 3 V Weight: approximately 370 grams each. Requires 4 AAA batteries (not included!!) Model charging station, three-color backlight to remind you whether your blood pressure is healthy. There is also a voice broadcast feature. The #1 cardiologist recommended brand, this is a clinically proven wrist sphygmomanometer and a suitable replacement for arm cuffs. Simplify your blood pressure monitoring with your own health knowledge on the go Easy to use home blood pressure meter on a portable wrist monitor, measures 11.7 x 9.5 x 6.5 cm, elevates your wrist to heart level for