A wireless expansion module with which you can add zones to the system with remote controls and use 3 additional PGM outputs located on the motherboard of the device.

ATTENTION!
The v5.50 firmware is the latest firmware for the old hardware version, while v6.26 is the latest firmware for the new hardware version.

Do not load the v6.26 firmware on an RTX3 with old hardware, while the v5.50 firmware should not be loaded on an RTX3 with new hardware, as this may cause RTX3 to fail!

The v5.50 firmware provides WD1 for the old hardware RTX3, while v6.26 provides minor bug fixes for the new hardware RTX3.