Air Quality Monitors can real-time detect & alarm CO2 in air, and  built-in with VOC, Temperature & Humidity sensors. They even can be customized with outputs to control air ventilation system directly. These devices are of high reliability and practicability, and able to work in any Z-Wave network with other Z-Wave certified devices. Monitor CO2 concentration in air with high accuracy Power supply:12VDC CO2 range: 0-2000ppm, default alarm threshold:1000ppm (adjustable) Temperature range: -9.0～50 ℃; Humidity range: 0%～99%RH Dimension: 90x130x28mm (3.5"x5.1"x1.1") Installation: Wall-mounted (Vertical), Hole Pitch：60mm or 82mm Z-Wave frequency: 868.42MHz(EU)