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Serial Bluetooth Adapter - RS232, Long Range - 5V ONLY [5V-UCBT232EXA] - $65.00 : Serial Data Communication by U.S. Converters LLC
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SystemBase - RS232 to Bluetooth Adapter, Class 1, 100m, Serial to Bluetooth, 2pcs/Pack (WCS-232 v6.0) : Electronics
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Price history & Review on RS232 Bluetooth Serial Adapter Board Communication Master Slave 2 Modes 5V Mini USB Bluetooth Serial Port Profile Module | AliExpress Seller - Yikeshu Store | Alitools.io
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