TP-Link UB400 Bluetooth 4.0 Nano USB Adapter.

Equip Your Computer with Bluetooth 4.0 Nano USB Adapter UB400. UB400 turns Non-Bluetooth PC or laptop into Bluetooth-capable devices. Just connect your Bluetooth devices such as your headset, game controller, mouse, keyboard, printers or smartphones to your computer and enjoy it with ease.

Bluetooth 4.0 – Applies the latest Bluetooth 4.0 with low energy (BLE) technology and it is backward compatible with Bluetooth V3.0/2.1/2.0/1.1
Driver Free – Plug and Play for Win 8, Win 8.1, and Win 10
Nano-Sized – Plug in and forget, Ultra-small for convenient portability with reliable high performance. The sleek, ultra-small design means you can insert the nano adapter into any USB port and simply keep it there, no matter when you are traveling or at home.
Supported Operating System – Supports Windows 10/8.1/8/7/XP
Plug and Play for Win 8, Win 8.1, and Win 10. Just plug UB400 into your computer to enjoy a fast, convenient Bluetooth connection.
Broad Operation Range - With a transmission distance of up to 10 m, you can enjoy lossless music via your Bluetooth headset without hovering around your computer.