For WJ-NX200K

•The number of cameras supported by the system can be increased by 7 channels with the purchase of WJ-NXE20W. (9ch → 16ch)

For WJ-NX200K/G

•The number of cameras supportedby the system can be increased in increments of 7 or 8 channels with the purchase of WJ-NXE20W. (9ch → 16ch → 24ch → 32ch)