The Hoyles Mains powered version of the EX204 EXITGUARD. It requires a supply of 220/240 volts 50 Hz. It is fitted with a SPCO alarm output relay that can be used for switching a remote strobe or additional sounder. An ON/OFF monitoring relay is NOT fitted. The Hoyles EX206 Mains powered version of the EX204 EXITGUARD. It requires a supply of 220/2..