Elsys ERS2 CO2 is a wireless LoRaWAN® sensor for indoor environments that measures CO2 level, temperature, humidity, light, and motion (PIR). Its Scandinavian design makes it discrete in business, public, and home environments. ERS2 CO2 requires low maintenance with its long battery life (up to 10 years), and the batteries can easily be changed when needed. Configurations of the sensor, such as sample rate, data rate, encryption keys, triggers, activation, and more, can quickly be done via NFC with a smartphone or via downlink. A traffic light feature lets you know when a certain threshold of the CO2 level, or any other value, has been reached. The threshold value is configurable, and you can choose the color of the light, the frequency, and the light intensity.