Resideo - Honeywell Home THM4000R1000 Thermostat Wireless Adapter

Thermostat Wireless Adapter; Item Wireless Adapter; Size 4-3/8 Inch Width x 1-1/4 Inch Depth x 5-9/16 Inch Height; Terminal Designation A, B, C, D; Mounting Type Wall Mount; Color/Finish Gray; Used On Item Thermostat/Humidification System; Used On Model/Brand RedLINK/TrueZONE/TrueSTEAM; Temperature Rating -40 to 165 Deg F; Humidity 5 to 95 Percent RH (Non-Condensing)