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Bluetooth 4.0 USB Module (v2.1 Back-Compatible) : ID 1327 : $11.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Amazon.com: Plugable USB Bluetooth 4.0 Low Energy Micro Adapter (Compatible with Windows 11, 10, 8.x, 7, Classic Bluetooth, Gamepad, and Stereo Headset Compatible) : Electronics
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Amazon.com: GMYLE Bluetooth 4.0 Broadcom Chip Dongle Adapter, Ultra-Mini USB Transmitter Receiver with LED, Support Windows 10, 8, 7, Plug and Play : Electronics
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Amazon.com: 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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Amazon.com: TP-Link USB Bluetooth Adapter for PC, Bluetooth 4.0 Dongle Receiver, Plug & Play, Nano Size, EDR & A2DP Technology, Supports Windows 11/10/8.1/8/7/XP for Desktop, Laptop, PS4/ Xbox Controllers (UB400) : Electronics
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USB Mini Bluetooth 4.0 CSR4.0 Adapter Dongle Bluetooth Receiver Wireless Transfer Adapter For PC Laptop Bluetooth Headphones Headset Speakers Keyboard Mouse Printer Windows 10/8.1/8/7 - Walmart.com
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TECHKEY Bluetooth Adapter for PC USB Bluetooth Dongle 4.0 EDR Receiver Wireless Transfer for Stereo Headphones Laptop Windows - Walmart.com
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Combination WiFi + Bluetooth 4.0 USB Adapter : ID 4827 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Asus USB BT400 Bluetooth 4.0 Bluetooth Adapter for Desktop ComputerNotebook USB 3 Mbits 2.48 GHz ISM 32.8 ft Indoor Range External - Office Depot
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