USB 2.0 To RS485 Converter adapter 1. With RS485 connector 2. No need external power, powered by USB port 3. Easy to Install USB 2.0 To RS485 Converter adapter Features:100% Brand New.Weight: 64.5g Length of cable: 74.5cm USB connector: to your PC RS485/RS422 connector: to your RS485/RS422 device Works with: Modems, smart card readers, terminal, POS (point of sale) devices, industrial control ...