Bluetooth 4.0 USB Adapter Most advanced Bluetooth 4.0 adapter, backward compatible with Bluetooth 2.0/2.1/3.0Enables wireless communication with Bluetooth-enabled computers, printers, phones, headsets, speakers, keyboards, controllers, and moreBluetooth Low Energy technology for energy-saving wireless connectivityHighly portable ultra-small design Shop Modal header New generation Bluetooth 4.0 for versatile wireless connectivity The USB-BT400 is a Bluetooth Smart Ready USB adapter with new Bluetooth 4.0 capabilities. It connects you with a multitude of compatible devices and supports Bluetooth Low Energy (BLE) to reduce power consumption. In dual-mode, the USB-BT400 maintains full backward compatibility with Bluetooth 3.0, 2.1, and 2.0. Get Bluetooth 4.0 and connect with multiple devices The ASUS USB-BT400 provides new and advanced Bluetooth 4.0 and enables wireless connectivity with a wide range of devices such as computers, printers, phones, headsets, speakers, keyboards, controllers, and more. In addition, the ultra-small USB-BT400 comes with Bluetooth Low Energy (BLE) technology, which lets you enjoy energy-saving connectivity.