Oxygen excessive alarm 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. Features: 2.8 inch LCD HD color display. Display the oxygen concentration and temperature and humidity values, the curve interface. Data saving function (can store 100000 data), set timing storage, delete data, view historical data., Weight: 0.72091159674 Pounds, Manufacturer: Taviko