Handheld Digital Oxygen Detector Air Oxygen Concentration Alarm Value USB Rechargeable Portable O₂ Content Tester 2.8-inch TFT Full Color LCD Screen Oxygen Meter

Highlights

• Display the oxygen concentration and temperature and humidity values, the curve interface.
• Oxygen excessive alarm peak buzzer sound (excessive alarm sound can be eliminated by pressing any key) + digital color change (alarm value default standard value), you can set 1%-30% alarm value.
• Data saving function (can store 100000 data), set timing storage, delete data, view historical data.
• The display brightness adjustment 5%-100%, the default brightness of 60%, 10 seconds after the screen saver minimum brightness, press any key can be restored to 60% brightness.
• Celsius °C and Fahrenheit °F switch, long press the ℃/℉ key to switch.