HANUTECHUniversal 1CH RS232/RS422/RS485 Optical Converter, Serial Data to Optical Fiber Converter, Interface Asynchronous Fiber Moderm SM 20KM - Pair

Hanutech Universal 1CH RS232/RS422/RS485 Optical Converter, Serial Data to Optical Fiber Converter, Interface Asynchronous Fiber Moderm SM 20KM - Pair

TP-Link USB to Ethernet Adapter (UE306), Foldable USB 3.0 to Giga Bit Ethernet LAN Network Adapter, Supports Nintendo Switch for Laptop, Desktop, Tablet (Black)

DTECH Port-Powered RS232 to RS485 Converter Adapter for Industrial Long Haul Serial Communication Supports 600W Anti-surge and 15KV Static Protection