• A battery life indicator
• In the absence of signals, the product would power-off automatically after 8 seconds
• Small, light in weight, and convenient to carry
• Keys function description: in standby mode, start the key instrument into the working state, Touch this button under the working state can change the display mode.
• Install a pair off AAA batteries into the battery compartment
• Plug a figure into a rubber hole of the Oximeter.
• Press button on the front panel to start.
• Do not shake your finger or move your body when the Oximeter is working.
• Press the button if you want to change display screen.
• The device will automatically power off in 8 seconds if there is no finger signal.
When plugging your finger into the Oximeter, your nail surface must be upward. Declaration: Please use the alcohol to clean the rubber before each test and clean the tested finger with alcohol before and after the test.