Ozone Meter Detector Handheld LCD Display 320 X 240 USB Charging Multifunctional Portable Ozone Analyzer Item Type: Ozone Meter Detector Material: ABS Display: 2.8 inch LCD, 320 x 240 pixels Atmospheric Pressure: 86Kpa-106Kpa PM Detection Method: Electrochemical Sampling Time: 1.5 seconds Power Supply: 1 x 2000mAh 654060 Li polymer battery (shipped with built in battery) Function: Detection of ozone, temperature, humidity Detection Range:0-50ppm Response Time: ≤15S Accuracy: ≤±2 % Sensitivity: 0.01ppm Insulation Resistance: ≥20MΩ Alarm Function: Sound (2-3 sounds) Default Alarm Value: 1.00ppm, can be set to 2.00ppm/4.00ppm/6.00ppm(alarm value on/off can be switched) Detection Temperature: -10℃-50℃ Relative Humidity: 20%-85% Storage Temperature: -10℃-60℃