According to Arlo guidelines, users can use 15 Arlo cameras simultaneously, but it also based on your Arlo configuration and Arlo subscription plan. Moreover, a user may not able to use up to 5 cameras per base station in case your internet has low speed or in case you are streaming other files during Arlo is streaming. If we talk about streaming through the Arlo app, the user can stream a maximum of 5 Arlo cameras attached to one base station. If you want to connect the 6th camera, then you have to turn off one of the active cameras. The same limitation is in the Arlo web portal, where you can stream a maximum of 5 cameras at one time.For more information, visit: www camera24x7 com