Pulse Oximeter, Heart Rate Monitor, Portable Pulse Oximeter for Sport Travel Home

Specifications:
Measurement range: 70-99%
Resolution: ±1%
Accuracy: ±2% (70%-99%), unspecified (Pulse rate :
Measurement range: 30-240 bpm
Resolution: ±1%
Accuracy: ±2bpm or +2% (select larger)
Low Perfusion ≤0.4%
Power: 1.5V (AAA size)
alkaline battery x2 (not included in package)
Supply voltage: 2.6-3.6V
Working current : ≤30mA
Automatic power off :Automatically power off when no signal in the oximeter for more than 8 seconds

Package included :
1 X Oximeter
1 X user manual
1 X lanyard

Notice:
1. Keep away from dust, vibration, corrosive substances, high Temperature and humidity.
2. If the becomes wet, stop operation.
3. When carrying from a cold environment to a warm and humid environment, please do not use it immedia