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CH340 USB To RS232 RS485 Serial Signal Switch Converter Adapter
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  • $26.16 
  • Free Shipping
UT-8812 2-ports USB to RS-232 Serial Converter with ESD protection
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  • $47.03 
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9pin RS232 USB 2.0 to 4 ports Serial DB9 COM Controller Connectors Adapter Hub
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  • $45.46 
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5 Pcs HL-340 USB To RS232 COM Port Serial PDA 9 Pin DB9 Adapter Support Windows7-64
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  • $20.43 
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USB 2.0 to RS422 RS485 Converter Adapter Serial PL2303 Chip Wholesale 2108G
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  • $29.93 
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PCIe to 2 Ports DB9 RS232 Serial  DB25 LPT Converter card AX99100 Chipset
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  • $26.60 
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UT-8814 4-ports USB to RS-232 Serial Converter surge protection 15KV ESD portection
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  • $83.60 
  • Free Shipping