Working Condition
Working temperature:5ºC~40ºC
Storage:-10ºC~40ºC
Humidity:Operating at 15%~80% Storage at 10%~80%
Ambient Pressure: 70kPa~106kPa
Battery:2×1.5V AAA
Transportation:-10~40ºC(14~104°F),humidity 10%-80%.Quick Start Guide
1.Insert 2 AAA battery in the chamber according to the +/- icon.
2.Insert the finger in the rubber channel, nail face up, then close the clamp.
3.Press "start" button on the panel and measure the SpO2. 

Maintenance
The operation process following the prompt:
1.Change battery when Low Voltage indicator lighted.
2.Clean the contact surface before using.
3.Take out the battery if not using for a long time.
4.Suggested working environment:-10~40ºC (14-104F).humidity 10%~80%
5.Keep the oximeter in dry environment, damp may shorten the lifetime or even damage the products.
6.Dispose the battery by local laws.