I bought this for my 2 family home and just realized that it only has one button therefore it can only be used for one home?

Compact Design - Place this kit’s push button and receiver anywhere, and always be notified when a visitor arrives no matter where you are in the house.Each push button can also be paired with multiple receivers to increase the notification coverage area. The Outdoor doorbell is constructed with a full aluminum front panel for protection from vandalism, while waterproofing protects from the rain or snow. Each receiver can work with up to 5 additional push buttons, it can be configured with different tones, so it is convenient for you to distinguish which door the visitors will enter from. Slide the switch to left, the Receiver will work only with sound; slide to middle, only LED flash; slide to right, sound and LED flash. Place this kit’s push button and receiver anywhere, and always be notified when a visitor arrives no matter where you are in the house.

Control up to 2 electric gate and door locks directly from the color monitor for even further security and convenience, so that you can open the gate and door more conveniently and securely from inside your house. Remote Unlock System - Remotely unlock up to 2 electric door/gate locks using the indoor color monitor for even better security and convenience. Press the push button on the doorbell once, a sounding wireless signal will be sent to the receiver. Slide the switch to the left position, the Receiver will work only with sound; slide to the middle position, only LED flash; slide to the right position, sound and LED flash.

Surface wall mounted for easy installation, 7-inch color monitor ensures you see and speak with all visitors freely! Please press the melody seletor button on the receiver to choose a ringtone and then press the code pairing button to confirm it and press the push button.