Withings BPM Connect Instruction Manual page 22

Accuracy (pulse)
Sensor
Operating conditions
Storage and transport conditions
Arm type
Power source
Weight
Accessories
Product life
Wireless transmission
Note:
Specifications are subject to change without prior notice or any obligation on the parts of the manufacturer
Within +-5% of reading
Semiconductor pressure sensor
5 to 40°C, 15 to 90% RH, atmospheric 86Kpa~106kpa, altitude: 2000m
-25 to 70°C, 10 to 95% RH, atmospheric 86Kpa~106kpa, altitude: 2000m
Use on left arm
5V 1A
Approx. 245g
Charging cable, Instruction manual
3 years
Wi-Fi and BLE
18 – 22