The Grundig Wireless Doorbell with 2 wireless receivers can be placed in any desired location in the home. Place the doorbell button at the front door. The set includes 2 receivers, which both run on 2 AA batteries (not included). This gives you the flexibility of moving the receivers around the home or even putting one in your pocket. The range between the doorbell button and receiver is up to 80 meters. Choose 1 of the 6 melodies or set up a light signal. The latter is especially convenient for seniors and the hearing impaired. You are also free to set the volume in the receiver's speakers. This way you won't have to worry about not hearing the bell.