Features include: • User- adjustable logging interval from one minute to four hours. • Also records relative humidity and ambient temperature. • Eight months battery life from two Lithium AA cells. • Data is downloaded in seconds via Bluetooth to Android smart phone App. • Designed for waterproof to IP 67. • Mounting bracket connects easily to both walls and poles. • Gases include NO2, NO2+O3, SO2, H2S, NH3 and CO.