RSH-CO2V1 WiFi Smart AirCO2 Quality Meter 

• CO2 Sensor 400～10000 ppm
• Accuracy: ± (50ppm + 5%reading value)
• Humidity sensor: 0~100%RH   accuracy ±2%RH(25℃)-40~+85℃ accuracy ±0.3℃
• Communication protocol: Wi-Fi