Power Type Battery Powered About This Item Multifunctional CO2 Detector: This air quality detector be in one can measure carbon dioxide content, ambient temperature and humidity in the air. Environmental comfort reminds users to pay attention to the surroundings through different colors. Real-time Monitor: Equipped with premium temperature sensor and humidity sensor. Measure quickly and get relatively stable measurement value. Carbon dioxide detection can be updated once per second. Large-screen design: high-definition color digital display, real-time display of air quality parameters content of CO2, temperature and humidity. High-precision thermometer and hygrometers to monitor indoor temperature and humidity in real time. USB charging: small CO2 detector easy to carry, can be charged via the charging port of any device mobile. Wide application: home, office, agricultural planting, greenhouse vegetables, production warehouses, etc. If there is any problem with the goods received, please contact our support team as soon as possible. We will serve you wholeheartedly.