Parani-UD100 Bluetooth 4.0 Class1 USB Adapter, Exchangeable Antenna
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Amazon.com: Tripp Lite Mini Bluetooth USB Adapter 4.0 (Class 1), Up to 164ft Range, 7 Devices (U261-001-BT4) : Electronics
USB Bluetooth Adapter for connecting RS232 devices via Bluetooth
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Tripp Lite Mini Bluetooth USB Adapter 4.0 Class 1 164ft Range 7 Devices network adapter USB U261-001-BT4 - Corporate Armor
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Linksys Bluetooth Class 1 USB Bluetooth Adapter USBBT100 | eBay