The Emerson 90-118E combination transformer and relay combination, SPNO/SPNC, 120 V primary. This can be installed on on a 4 in. x in. junction box. The pre-wired line voltage connections and color-coded and pre-striped leads provide easy installation. Energy limiting class II transformer design and low voltage connections on terminal board.24 VAC secondaryLine voltage connections pre-wiredColor coded pre-stripped leads for easy installLow voltage connections on terminal boardEasy installation on a 4 in. x 4 in. junction box. Cancer and Reproductive Harm www.P65Warnings.ca.gov