THM5421R1021 Honeywellredlink

wireless adaptor to upgrade conventional equipment to wireless. Works with New Vision Pro 8000 thermostats. Up to 4 heat, 2 cool Heat pump; 3 heat, 2 cool conventional. 3 sets of universla IAQ contacts and 4 sensor inputs. Used with all versions of Prestige IAQ and the new Vision Pro 8000 w/ RedLINK. EIM