The BELIMO 22RT-A001 is an LCD room unit / room controller made by Belimo designed for use with ZoneEase cloud-connected VAV systems (Variable Air Volume HVAC controllers). It’s a small wall-mounted device that lets you display and adjust room temperature and control HVAC modes such as On/Off, Eco, Boost, etc., and it also works as an NFC interface for setup and configuration with a smartphone.