USB adapter for Bluetooth 4.0 Advanced USB adapter for Bluetooth 4.0, backward compatibility with Bluetooth® 2.0/2.1/3.0 Provides wireless connectivity with Bluetooth-operated computers, printers, phones, headsets, speakers, keyboards, controllers and other devices Bluetooth Low Energy technology provides energy-efficient wireless connectivity Extremely mobile, ultra slender design New Bluetooth 4.0 generation for versatile wireless connectivity USB-BT400 is a USB adapter for Bluetooth offering Smart Ready functionality and new Bluetooth 4.0 connectivity capabilities. The adapter allows you to connect with many compatible devices and supports Bluetooth Low Energy (BLE) technology to reduce energy consumption. In dual mode, USB-BT400 retains full backward compatibility with Bluetooth 3.0, 2.1 and 2.0 connections. Ensure Bluetooth 4 and connect to multiple devices ASUS USB-BT400 uses the new advanced Bluetooth 4.0 technology and allows wireless connections to a wide range of devices, such as computers, printers, phones, headsets, speakers, keyboards, controllers and more. In addition, the ultra-smuggle USB-BT400 adapter uses Bluetooth Low Energy (BLE) technology to enjoy energy savings during connections.