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Use a soft damp cloth and a drop of mild soap to remove any haze. Air dry.
DB9 female to RJ11 4p4c Cables 1M(3.3 ft).
Please noted that, the device RX should match TX from PC, TX should to RX from PC.
It is DB9 RS232 sigaals, no chips inside.
Application: POS colder scanner smart meter gluco meter switcher router etc instrumentation.
1 x DB9 female to RJ11 4p4c Cables