Hi, feixue!
Welcome to our community!
One iClient can manage a maximum of 16 IVS1800 devices and connect to a maximum of 256 cameras. The iClient must be installed on a computer. Therefore, a computer is required in this scenario.
If each IVS1800 device connects to 64 cameras, one iClient can manage a maximum of four IVS1800 devices.
If each IVS1800 device connects to 16 cameras, one iClient can manage a maximum of 16 IVS1800 devices.
If you have any problems, please post them in our Community. We are happy to solve them for you!