Remote sensor for SimpleComfort PRO Series and Fan Coil thermostats (except SC4010 & SC5010 models) Ideal for tamper-prone areas or poor air-flow areas Mounts to standard 2" x 4" outlet box Foam gasket prevents drafts through wall opening For use with ICM's SC700, SC4000 and SC5000 series thermostats (except SC4010 and SC5010 models)