The RE-WS-WIFI-Y is a multi-probe wireless industrial-grade temperature and humidity transmitter, which can upload up to 4 channels of temperature and humidity data collected to the server via WIFI. Wirelessly pair multiple network connection units to a single base station via WIFI, and store your temperature or humidity readings in the cloud. Multi-channel temperature data logger has 1, 2, 3, 4 probes for choice.