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With the KlikAanKlikUit ACDB-7000BC, you can easily replace your current doorbell. Put the wireless receiver in a socket of your choice, and place the doorbell button at the door. The doorbell button works on the current doorbell's input. Receiver and doorbell button will then automatically make contact, so no need to worry about any of that. Choose 1 of 5 melodies, and from 4 different volume levels. So you'll decide for yourself just how loud your doorbell needs to be. When someone rings the doorbell, the led light in the receiver will start blinking. Handy, when your music is on just a little bit too loud, or when you're hearing impaired. This set can easily be expanded with other doorbells, so you can hear the bell ringing in other rooms in your house as well.