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 with Temperature and Humidity for Car Home Office School Hospital

Description

Features:
2.8 inch LCD HD color display.
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.

Photo