Note: The cuff circumference of this blood pressure monitor is 22–52 cm, designed specifically for larger arms. The minimum measurement is 22 cm, and the maximum is 52 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
Display mode: LCD liquid crystal display
Measuring method: Oscillographic method
Measuring range
Pressure: 0-280mmHg
Pulse rate: 40 times/min-199 times/min
Accuracy: Pressure: ±3mmHg Pulse rate: ±5%
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
Weight: about 410 grams
Dimensions (host): about 126mm long x 98mm wide x 60mm high
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
Cuff circumference: about XL 22-52cm(It fits best on arms with a circumference of 30 cm or more.)

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