You can easily share access to the Sphere Alarm System even if others have not yet installed the app on their own smartphones or tablets. Go to [Device Settings]-[Share Device] in the Sphere Alarm app to generate a unique QR code linked to the current Base Unit. Users can send this QR code to others by text or email. Once recipients scan the QR code, they can launch the app. (If they haven’t yet put the app on their devices, they would need to first download and install it.). When the Sphere Alarm app is launched, the invited user will be able to join the group of users. The QR code is valid for 60 minutes.