Features: 3.5 inch LCD displayTest variables Ozone(O3), temperature, humidity 2000mAh capacity Lithium battery5V Micro-USB chargingLow battery warningDisplay : 3.5 inch LCD displayAtmospheric pressure: 86Kpa - 106KpaDetection for O3: ElectrochemistrySampling time: 1.5 secondsDetection temperature: -10C to 50CRelative humidity: 20% - 85%Storage temperature: -10C to 60CConcentration unit for O3: ppmPower source: Lithium battery with 2000mAh capacityMaterial: Plasticcolour: As shownPackage Contents: 1 x Portable Ozone AnalyzerOnly the above package content, other products are not included.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.