... u Hotel, exhibition hall, hospital, shop, restaurant, air port, train station, theater and other public places u House, villa, office, meeting ... Power Supply Type G01-CO2-B320D CO2, temperature and humidity monitor/alarm Three-color backlit LCD, buzzer alarm 100~240VAC ... socket. Wall mounting G01-CO2-B340C CO2, temperature and humidity monitor/controller Three-color backlit LCD, buzzer alarm; 1 on/off ...