Onset’s HOBO MX1102 data logger records and transmits carbon dioxide, temperature and relative humidity data wirelessly to mobile devices via Bluetooth Smart. It measures CO2 over a range of 0 – 5,000 parts per million and enables users to access the data from mobile devices within a 100’ range. It can run for six months on four, user-replaceable AA batteries. It features an easy-to-read LCD and onboard USB port. The HOBOmobile app allows users to configure the logger and manage the collected data.