Yet the cheapest (called Battery Video Doorbell) costs £99.99, the mid-range model (Battery Video Doorbell Plus) is £129.99 and the most expensive (Battery Video Doorbell Pro) is £199.99.

The project uses an ESP32-CAM board as the doorbell’s core, paired with a momentary push button and all housed inside a 3D-printed enclosure.

The sound played by the Ring Video Doorbell itself – the noise heard by a visitor when they press the button – cannot be changed. That’s always the same three-chime sound you’ll have heard ...

The Lockly Vision Elite smart lock features a fingerprint reader, a digital keypad, a 1080p HD video doorbell, and a built-in solar panel to keep everything charged.

Using the TCL D1 Max When the doorbell button is pressed, a push notification is delivered to your phone, which, when tapped, opens a live video stream of the lock’s camera.