USB Bluetooth Adapter PC 4.0, Wireless Bluetooth Receiver - Maxesla
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
Iogear Bluetooth 4.0 USB Micro Adapter - GBU521 - Wireless Adapters - CDW.com
U2W Plus) Carlinkit 3.0/ 4.0 Wireless Apple CarPlay/ Android Auto Ada - Carlinkit Carplay Store
U2W Plus) Carlinkit 3.0/ 4.0 Wireless Apple CarPlay/ Android Auto Ada - Carlinkit Carplay Store
Amazon.com: Bluetooth 4.0 USB Dongle Adapter - Maxesla Wireless Bluetooth Transmitter Receiver for Windows 10/8 / 7 / Vista/XP Laptop PC for Bluetooth Speaker, Headset, Keyboard, Mouse, Game Controller Black : Electronics
Wireless USB 5.0 / 4.0 / 2.0 Bluetooth Dongle Adapter for PC Keyboard Mouse | eBay
Vello Wireless ShutterBoss 4.0 Remote Timer and Trigger RCW-4-C
Audio Receiver Transmitter | Bluetooth Adapter Dongle | Bluetooth Adapter Stereo - Aliexpress
100m Long Range Bluetooth Usb Dongle Wireless Bluetooth 4.0 Csr Adapter For Windows 10, 8, 7 Xp Vista - Wireless Adapter - AliExpress
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Amazon.com: StarTech.com Bluetooth Adapter - Mini Bluetooth 4.0 USB Adapter - 50m/165ft Wireless Bluetooth Dongle - Smart Ready LE+EDR (USBBT1EDR4),Black : Everything Else
4827 Adafruit Industries LLC | RF and Wireless | DigiKey
CSR Wireless Bluetooth USB Dongle Adapter - 4.0
Combination WiFi + Bluetooth 4.0 USB Adapter : ID 4827 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits