User's Manual

Megaring®
2
Specification
Pulse Rate
Update Interval
1 sec
Range
30bpm-240bpm
Precision
±2bpm or ±2%
Specifications
Power Supply
Internal Power Supply
Built-in lithium-ion battery
3.7V
Interface
Bluetooth
4.2BLE
Structure
All-metal mainframe case
with USB charging adapte
Ambient
requirements
Operation
5-40℃，relative humidity：15%～
80%
（non-condesation），atmospheric
pressure70KPa～106KPa
Storage
5-40℃，relative humidity：15%～
80%
（non-condesation），
atmospheric pressure
50.0KPa～107.4KPa
Physical
specifications
Appearance and size
Annulus, inner diameter:18mm,
20mm
Weight
≤10g (mainframe)
Working range
Bluetooth Interface
Within 3 meters
Measuring
Range
Pulse Rate
30bpm-240bpm
SpO2
75%-100%
PR Measuring
Error
±2bpm or ±2%
Select the maximum value
SpO2
Measuring Error
±3% (SpO2 ranges from
70% to 100%)
Peak
Wavelength
Red light: 660±10nm
Infrared ray: 940±10nm
Red light power ≤ 10mW
Infrared ray power≤ 10mW
Operating
time
12 Hours
Operating time in Sleep
mode