Wirless intercoms requires no wires, only to the gate/door panel which can be located local to the gate or door. When the button on the a gate or door Caller station is pressed it makes a call to a handset in the property,the user can then speak to the caller on their handset and by simply pressing lock release button on the handset the user can open the gate or door. Wireless Intercoms make a call from the intercom caller station at the gate or door to a cordless handset in the property. When the gate or door user answers the call they can speak to the caller and grant access by pressing a button on the handset. Wireless intercoms are available without keypad or with code lock, and also video intercom range. With most Wireless intercoms it is important to have line of sight in order for proper working of the intercom. There is a specific working range with wireless intercoms available on product data sheets.