Delock Products 83787 Delock USB 2.0 to Serial LVTTL Converter with 6 pin header female separately 1.8 m (3.3 V)
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PL2303TA 3.3v-5v TTL USB Serial Port Adapter with cable - PL2303TACABLE
Amazon.co.jp: DTECH USB TTL Serial Converter Cable 3.3V 1m PL2303 Chipset 4 Pin 2.54mm Pitch Female Connector USB TTL Serial Converter Cable for Windows 10 8 7 XP Vista Mac : Computers