Manual information
Brand:EKEN
APP: Aiwit
Model:T8
Features

1. Motion Sensor
2. Wide-angle Lens
3. Hidden Infrared Lights
4. Light Sensor
5. Microphone
6. Doorbell Button
7. Indicator Lights
8. Speaker

9. Micro USB Port (Battery Charging)
In the box

User Manual
The same way as V5,V8, please check T5,T7 User Manual
How are you supposed to fix the unit to the back plate without the security screws. (none supplied)
Are additional chimes available for the T8 model, so that the doorbell can be heard in different parts of a large house?
As far as I understand, there is. Suggest looking on Amazon, or consult your camera seller
I cannot get the camera to connect to the QR code