Features: 3.5 inch LCD display_x000D_ Test variables Ozone(O3), temperature, humidity_x000D_ Large 2000mAh capacity Lithium battery_x000D_ 5V Micro-USB charging_x000D_ Low battery warning_x000D_ _x000D_ Display method: 3.5 inch LCD display_x000D_ Atmospheric pressure: 86Kpa - 106Kpa_x000D_ Detection method for O3: Electrochemistry_x000D_ Sampling time: 1.5 seconds_x000D_ Detection temperature: -10C to 50C_x000D_ Relative humidity: 20% - 85%_x000D_ Storage temperature: -10C to 60C_x000D_ Concentration unit for O3: ppm_x000D_ Power source: Lithium battery with 2000mAh capacity_x000D_ Material: Plastic_x000D_ colour: As shown_x000D_ _x000D_ Package Contents: _x000D_ 1 x Portable Ozone Analyzer_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ 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. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_