The nicest feature of this wireless intercom is that it is full-duplex, which means that once you answer a call, both parties can speak without having to press a button. They work more like a cordless telephone and, in fact, they use the same DECT 6.0 technology, which is encrypted so your neighbors will not be able to listen in. In the past, wireless intercoms worked more like walkie-talkie radios where one radio could talk at a time with push-to-talk and release-to-listen functionality.
To call an individual room you first press the Call button, then the number of the unit you want to call. When they answer you have a private conversation with only that station.
These intercoms are very flexible on power. They come with an AC adapter, you can use a standard USB battery pack, you can plug it into a computer, or you can use OPTIONAL, removable 18650 rechargeable batteries. These are the kind used in flashlights, and some Tesla electric cars still use these as their cells in their battery pack. The batteries will last approximately a week of normal operation before needing recharging or swapping with a charged battery.
The range of these intercoms is up to 1000 feet, however that is in an open environment with no walls in between. Range will be lower with obstructions.
The best feature besides the full duplex capability on this intercom is the channel feature. There are 6 channels and you can set the default channel on each intercom so that if a user leaves their channel to talk to someone else, it will default back to its preprogrammed channel. The maximum number of intercoms you can have in your system is six (1 master and 5 substations) so you cannot add more rooms beyond this limit.
The Group button enables you to call all stations no matter what channel they are on, but it is limited to 4 stations in the group.
To put a unit into monitor mode, press the Monitor button. The channel LED indicator will flash to show available channels on the master unit. Press the channel button that you want to monitor. The unit will be continuously monitored by other units. Press the Monitor button again to exit monitor mode.
To see how to order this intercom, click this link: 6-Channel Wireless Intercom