HOBO MX Multi-Channel data loggers use Bluetooth technology to transmit indoor monitoring data to mobile devices using Onset's free HOBOconnect app. The HOBO Analog/Temperature/Relative Humidity (RH)/Light data logger and the HOBO 4-Channel Analog data logger support new Self-Describing (SD) sensors, which automatically communicate configuration information to the loggers, making deployment fast and easy. The logger is designed for wireless setup and easy data offload via Bluetooth.