Waveshare Industrial USB to 4CH TTL Converter USB to UART with Multi Protection Circuits Multi Systems Support

Extending USB to 4CH TTL (UART) with hardware flow control, allows concurrent and independent communication for each channel
Onboard resettable fuse and protection diodes, ensures the current/voltage stable outputs, provides over-current/over-voltage proof, improves shock resistance
Onboard IO protection circuit for surge suppress and ESD protection, safe and stable communication
Aluminium alloy enclosure with oxidation dull-polish surface, CNC process opening, solid and durable, well-crafted
Onboard TTL serial port 3.3V and 5V voltage level switch, allows selecting TTL level. Quality USB-B connector, and IDC connector with fool-proof design.