Cameras either run on wifi or Bluetooth. Use your phone to scan the area
. You should see available devices sbf go from there if that doesn't
work look on eBay for devices that sniff out cameras .
The same pin (needle type) tool you use to open your SIM card/SD slot on
your phone , you would use at the bottom of your attached doorbell to
release it from it's holder. The qr code is on the back . It snaps right
in and off.