F300 REMOTE OPERATOR
Key Details

• Brand/Manufacturer: Adlee Power / C.B. Electronics 
• Function: Enables external speed adjustment, remote operation, and monitoring of compatible inverters from a distance. 
• Connection: Uses a communication extension cable available in varying lengths (commonly 1M, 3M, or 5M options). 
• Inverter Compatibility: Requires "R" model remote-capable inverters (such as Adlee AS2/AS3 series remote variants). 

If you need wiring diagrams, compatible inverter model numbers, or where to order a replacement cable, let me know what specific setup you are working with.