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Cable Matters USB Bluetooth Adapter (USB to Bluetooth 4.0 Adapter) for Windows 10, 8.1, 8, 7, Vista, XP, Raspberry Pi in Black : Electronics

This Bluetooth adapter is a fingernail-sized unit that can plug into laptop or tablet's USB port for instant functionality.

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Cable Matters USB Bluetooth Adapter (USB to Bluetooth 4.0 Adapter) for Windows 10, 8.1, 8, 7, Vista, XP, Raspberry Pi in Black : Electronics

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StarTech.com Bluetooth Adapter - Mini USB Adapter - Bluetooth 2.1 - Class 1 EDR - Bluetooth Receiver (USBBT1EDR2) : Everything Else