Bluetooth 4.0 USB Module (v2.1 Back-Compatible) : ID 1327 : $11.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Bluetooth USB CSR 4.0 Plug-in Dongle to connect Windows Computers - Ne
Mini USB Bluetooth 4.0 Dongle - 50m - Bluetooth & Telecom Adapters | Networking IO Products | StarTech.com
Bluetooth CSR 4.0 Dongle
Amazon.com: Bluetooth CSR 4.0 USB Dongle Adapter, EKSEN Bluetooth Transmitter of Electronic Signals for Windows 10/8/7/Vista - Plug and Play on Win 8 and Above - White : Electronics
Bluetooth 4.0 USB Adapter, Lovin Product USB Bluetooth Wireless Micro Adapter Compatible with Windows 10,8.1/8,7,Vista, XP, 32/64 Bit for Desktop, Laptop, Computers – lovinproducts
Bluetooth USB Adapter CSR 4.0 USB Dongle Bluetooth Receiver Transfer Wireless Adapter for Laptop PC Support Windows 10/8/7/Vista/XP, Mouse and Keyboard,Headset - Walmart.com
Amazon.com: Deal4GO CSR 4.0 USB Bluetooth Adapter CSR8510 Mini Bluetooth 4.0 Dongle Wireless Receiver for Windows 10/8/7/Vista/XP Supports Mouse Keyboard Headphone : Electronics
Bluetooth Adapter Mini - DFRobot
Bluetooth 4.0 Dongle CSR 4.0 - Compu store
Amazon.com: BlueDot Trading Mini Bluetooth Smart Low Energy Dongle Adapter, CSR 4.0 CSR4.0 Compliant, USB 2.0, for Windows 8 7 XP, Laptop Desktop PC : Electronics
Wireless USB Bluetooth Adapter Bluetooth V4.0 CSR 4.0 Dongle Music Sound Receiver Adaptador Bluetooth Transmitter For PC LAPTOP - AliExpress
1x Connector Dongle Adapter Car JVC KS-UBT1 Audio Dual Bluetooth 4.0 Tool | eBay