The TP-Link UB400 Bluetooth 4.0 Nano USB Adapter is a compact black device that allows your Windows 8/8.1/10 computer to connect wirelessly to Bluetooth-enabled devices. With its Bluetooth v4.0 standard, this adapter provides reliable connectivity for a seamless user experience. The adapter is easy to install and use, making it a convenient solution for enhancing your home networking and connectivity setup. Made by TP-Link, a trusted brand known for its reliable networking products, the UB400 is a versatile and efficient option for those looking to add Bluetooth functionality to their devices.