Rigol DIGITALIO-DP800 trigger channels (4-off lines, in or out) licence for Rigol DP800 series programmable linear DC power supplies.
Each licence contains a unique product key. The product key is used to generate a software licence code that must be entered into your instrument. To generate a Rigol software licence code using your Rigol product key, please see HERE. Installed software licence codes are permanent – They are unaffected by Rigol firmware updates.