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4K HDMI USB/Audio/RS232/IR KVM Extender over CAT5e or Fiber Kit - HKM0
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TV One 1T-CT-653 HDMI over CAT5e/6 with LAN/RS232 1T-CT-653 B&H
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USB to RS232 Adapter with PL2303 Chipset, CableCreation 6.6 ft USB 2.0 Male to RS232 Female DB9 Serial Converter Cable for Cashier Register, Modem, Scanner, Digital Cameras, CNC,Black - Walmart.com
