Plugable USB Bluetooth 4.0 Low Energy Micro Adapter (Windows 10, 8.1, 8, 7, Raspberry Pi, Linux Compatible; Classic Bluetooth, and Stereo Headset Compatible) (c9dd1431cea567a472efe28009a43bf0) - PCPartPicker

Add Bluetooth capability to your computer super fast with a USB BT 4.0 adapter. This adapter is backwards compatible with v2.1 and earlier, but also supports the latest v4.0/Bluetooth Low Energy. Inside lies a CSR8510 Bluetooth USB host.

adafruit-Bluetooth 4.0 USB Module (v2.1 Back-Compatible) ADA1327

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

Plugable USB 2.0 Bluetooth® Adapter – Plugable Technologies

Bluetooth 4.0 USB Module (v2.1 Back-Compatible) : ID 1327 : $11.95 : Adafruit Industries, Unique & fun DIY electronics and kits

The Kinivo BTD-400 Bluetooth USB Adapter lets you communicate wirelessly with Bluetooth devices such as cell phones, PDAs, mice, keyboards etc. BTD-400 is highly portable due to its petite dimensions. It seamlessly gets plugged into a computer/laptop without blocking surrounding USB ports.

Kinivo BTD-400 Bluetooth 4.0 USB Adapter - for Windows 7/Vista

Panda Bluetooth 4.0 USB Nano Adapter - Windows XP/Vista/7/8/8.1/ 10/11, Mint, Ubuntu, Fedora, openSUSE, Lubuntu, Zorin, BackTrack5 R3, Kali Linux, Raspbrian Wheezy and OpenELEC : Electronics

Plugable USB 2.0 Bluetooth® Adapter – Plugable Technologies

Plugable USB 2.0 Bluetooth® Adapter – Plugable Technologies

Plugable USB Bluetooth 4.0 Low Energy Micro Adapter (Windows 10, 8.1, 8, 7, Raspberry Pi, Linux Compatible; Classic Bluetooth, and Stereo Headset Compatible) ( c9dd1431cea567a472efe28009a43bf0) - PCPartPicker