StarTech.com USB Bluetooth 5.0 Adapter, USB Bluetooth Dongle Receiver for PC/Computer/Laptop/Keyboard/Mouse/Headsets, Range 33ft/10m, EDR (USBA-BLUETOOTH-V5-C2) - network adapter - USB
StarTech.com Bluetooth 5.0 Audio Receiver with NFC, Bluetooth Wireless Audio Adapter BT 5.0, 66ft (20m) Range, 3.5mm/RCA or Digital Toslink/SPDIF Optical Output, Lossless HiFi Wolfson DAC - For Stereos/Speakers - Bluetooth wireless audio receiver
StarTech.com Bluetooth Adapter - Mini Bluetooth 4.0 USB Adapter - 50m/165ft Wireless Bluetooth Dongle - Smart Ready LE+EDR (USBBT1EDR4) - network adapter - USB
Lenovo Unified Pairing - wireless mouse / keyboard receiver - USB
Connect a supported PS/2 keyboard to the USB port on your computer. The GC46MFKEY PS/2 Keyboard to USB Adapter features a USB-A male connector and a 6-pin (PS/2) female port, allowing you to connect a PS/2 keyboard to a computer through a USB port.
Dell Universal Pairing Receiver WR221 - wireless mouse / keyboard receiver - USB, RF 2.4 GHz