You can place the Grundig Wireless Doorbell with 1 Wireless Receiver anywhere in your home. Place the doorbell button at the front door. The receiver works on 2 AA batteries. This gives you the flexibility to place it anywhere in your home or even take it upstairs in your pocket. The range between the doorbell button and receiver is up to 80m. Choose from one of 6 melodies or set up a light signal when someone rings your doorbell. That's useful for senior citizens and the hearing impaired. You can also set the volume of the receiver. This way, you can be sure you always hear the doorbell.