Farfisa 2 Wire Audio Entry System, with Illuminated 1 or 2 Button External Panel. White wall mounted handset included along with a 12vAC Power unit. This can be used with a standard electric release such as our DR2S or with a magnetic lock such as our S300. If you are purchasing this item with a S300, You will also need the Item 1471 Relay. Each Apartment can have a 1 additional Handset (PT511W).