SECRUI Wireless Doorbell Chime Alarm

How to setup the Secrui wireless chime and alarm system.
To order:
Wireless Doorbell Chime, SECRUI Door Alarm Sensor with 400ft Range 52 Ringtones 5 Adjustable Volume Level for Home Business Store, 2 Sensors + 1 Receiver, Black : amzn.to/3G6JVCA

[@eduardo13405]

I have this same brand but my doorbell ones are different mine don’t disconnect like these so I don’t understand how to pair to different tones