<p>Features:</p> <p>2.8 inch LCD HD color display.</p> <p>Display the oxygen concentration and temperature and humidity values, the curve interface.</p> <p>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.</p> <p>Data saving function (can store 100000 data), set timing storage, delete data, view historical data.</p> <p>Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you!</p> <p>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.</p> <p>Celsius \u00B0C and Fahrenheit \u00B0F switch, long press the \u2103\/\u2109 key to switch.</p> <p>Specifications:</p> <p>Model: A8</p> <p>Material: ABS</p> <p>Display Method: 2.8 inch TFT full color LED backlight LCD screen</p> <p>Oxygen Measurement Range: 0-30%VOL</p> <p>Oxygen Resolution: 0.1%</p> <p>Temperature Measurement Range: -9\u2103~55\u2103</p> <p>Humidity Measurement Range: 0%RH~100%RH</p> <p>Lithium Battery Capacity: 2500mAh</p> <p>Standard Charging Voltage: 5.0\u00B10.5V</p> <p>Color: As shown</p> <p>Package Contents:</p> <p>1 x Handheld Oxygen Concentration Detector</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>