Do you know? You can add as many shared users as you want, and they all can have access to your device.
1. Select the Setting(Gear icon) of the device that you want to share
2. Select Share Device
3. Select the Plus icon at the bottom
4. Type in the user Account (Email) you want to share with.
Double check the email and make sure there's no typo. If the user you are trying to share with has not signed up an account in the iseeBell app yet, ask him/her to do that first, otherwise, you will get an error message stating that their account cannot be found.