Note: The cuff circumference of this blood pressure monitor is 22–48 cm, designed specifically for larger arms. The minimum measurement is 22 cm, and the maximum is 48 cm. It fits best on arms with a circumference of 30 cm or more. While it can be used on arms with a circumference of less than 30 cm, the cuff will be loose.

Digital Blood Pressure Monitor Upper Arm Automatic BP Machine Heart Rate Monitor

Blood Pressure Monitor Features:
Name: Arm Type Automatic Electronic Blood Pressure Monitor
Blood Pressure Monitor Display mode: LCD liquid crystal display
Blood Pressure Monitor Measuring method: Oscillographic method

Blood Pressure Monitor Measuring range
Blood Pressure Monitor Pressure: 0-280mmHg
Blood Pressure Monitor Pulse rate: 40 times/min-199 times/min
Blood Pressure Monitor Accuracy: Pressure: ±3mmHg  Pulse rate: ±5%

Blood Pressure Monitor Power supply: 3pcs AAA batteries or USB 6V power supply (Batteries and USB cable are not included in the package) 
Normal working environment: temperature 5-40C   Humidity≤80%RH
Transportation and storage environment: Humidity-20-55C   Humidity 10%-90%RH

Blood Pressure Monitor Weight: about 410 grams
Blood Pressure Monitor Dimensions (host): about 126mm long x 98mm wide x 60mm high
Blood Pressure Monitor Safety classification: Internal power supply type B

Pressure method: Pressure adjustment method of vibrating plate pump
Quick exhaust method: Extreme speed exhaust valve opening method
Pressure detection: semiconductor pressure sensor
Pulse detection: semiconductor pressure sensor

Package:
1X Blood Pressure Monitor( Has the Voice Broadcast Function)
Consult a medical professional first and follow the instructions.