Monitor temperature and humidity across multiple locations with this advanced multi-channel hygrometer system. The main unit features a built-in sensor, while one remote sensor is included to track conditions in two different areas simultaneously. Expandable up to 4 locations with additional remote sensors (sold separately). The 4" HTN LCD touchscreen displays readings with 178° wide viewing angles and backlighting for low-light visibility. Track trends and 24-hour min/max records to stay informed of environmental changes. Wireless transmission reaches up to 200ft/60m, with battery status indicators for both main and remote units. Perfect for hydroponic gardens, grow rooms, and climate-sensitive spaces.