Bluetooth 5.4 USB Adapter for PC - Wireless Dongle Transmitter/Receiver, Plug & Play for Windows 11/10/7, Supports Keyboard/Mouse/Headphones/Speakers/Game Controller (BR+EDR+BLE Dual Mode) BT5.4 is up for auction in Electronics. The current bid is $2.00, 85% below the $13.00 MSRP, in As Is condition. This auction has ended — similar items appear in live auctions regularly.