You can call in groups or talk privately with other devices. You can take it anywhere since this intercom can be used with power bank. It’s suitable for outdoor activities. The intercoms can be placed anywhere in your house, such as kitchen, bedroom, living room, elder room, garage etc. You can easy know what's going on with your family member in the other room or house. This wireless intercom is convenient for office which you can communicate with various departments on different floors. You can monitor the room as you want by using monitor (10 hours once time).