DMX Output Driver Chip for Legacy Unison CE CMEd, CMEd, CE CME, CME, CE CMEi and CMEi Processors. Installation Instructions can be found here: https://support.etcconnect.com/ETC/Architectural/Legacy_Unison/Legacy_Unison_Processors/Hardware/Unison_CMEd%2C_CME_and_CMEi_Output_DMX_Driver_Replacement
If you need to purchase a larger quantity, please contact your local dealer, or reach out to ETC Customer Service if you are a dealer or representative.