An intercom is a 2 way communication device consisting of a call button and speech panel on the outside of your property (the other side of your gate) and a telephone handset inside your home, from which you can grant or deny access to your visitors at the touch of a button. Some intercoms have video handsets/ panels, others are audio only. Some of the video intercoms come with night vision cameras so you can still see your visitors at night. Installation options include wired versions which require cabling laying from your gate to your home or wireless intercoms which work on radio frequencies and are much faster and easier to install. The intercom will be connected in to your electric gates control panel and then when the entry button is pressed, the intercom gives the signal to the gates to open. Intercoms have the option to have codelock keypads which means the gates can be opened by anyone who knows the 4 digit code.