I have a multi family house amd we need to put 3 door bells, is itgoing to be a problem even if we buy 3 of them? How they will work if we get 3? There is a volume button between melody selector and sound-and-flash switch. Press it to adjust the sound volume to be high, medium and low.

There are 36 chimes with 6 levels of adjustable ringing volume (High / Medium / Low) from 25-110 dB, you can choose anyone you like. In addition, there are 3 modes to choose (Sound only /LED Flash only /Sound and LED Flash), you can choose the LED Flash mode when someone is sleeping(especial a baby). This mode also design for the person who is hearing impaired. Our doorbell push button can be paired with multiple receivers. But we don't have a single receiver to sell. Infrared LED Night Vision, Easy installation - Provides clear vision of visitors even in the darkness of night. Easy 2-wire setup system includes installation materials and 49ft(15m) connecting cable.The Outdoor doorbell is constructed with a full aluminum front panel for protection from vandalism, while waterproofing protects from the rain or snow. As far as I know, the receiver is plugged into an electrical outset. I believe that is 120 Volts, or whatever the standard American outlet is.

Notification Modes - Press the Sound-and-Flash Button for your favored notification modes (Sound/LED Flash/Sound and LED Flash) Do remember the LED Flash mode is available when you don’t want to be disturbed Where can i buy the additional push button? can i pair 2 push buttons with different tones? is there any holiday tone?Wireless Doorbell, Portable Round Doorbell Operating at 500 feet, 36 Chimes, 6 Levels Volume and LED Flash