Please Note: This is the dealer level handset and as such will not work on all Curtis controls. It may not adjust all settings as the vehicle OEM determines the settings that are made available for safety reasons. This handset cannot be returned, all sales final.
Updated models:
-3301 is the general hardware that only supports serial communication. It is identifiable by a gray gasket around the case.
The -3231 is the gen2, and supports both serial and CAN communication. It is identifiable by a blue gasket around the case.
The gen1 have been obsolete since 2015 and no longer supported