Bell & Howell Wireless Doorman Doorbell With Talking And Listening Intercom Doorbell with Intercom can be set up in just a few minutes - no hardwiring required. Easy to operate. Simply press the talk button to use like a walkie-talkie. The inside unit is portable and can be carried from room to room freely or attached to the wall. Panic button sets off a loud alarm that can help scare away unwanted intruders. Cordless receiver sets up in any room or attaches to wall.