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Amazon.com: YWBL-WH 2 PCS HL-340 USB to RS232 COM Port Serial PDA 9 pin DB9 Cable Adapter : Electronics
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WAVGAT HL-340 HL340 New USB to RS232 COM Port Serial PDA 9 pin DB9 Adapter support Windows7-64 - AliExpress
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Amazon.com: YWBL-WH 2 PCS HL-340 USB to RS232 COM Port Serial PDA 9 pin DB9 Cable Adapter : Electronics
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