Bluetooth 4.0 USB Adapter Most advanced Bluetooth 4.0 adapter, backward compatible with Bluetooth 2.0/2.1/3.0 Enables wireless communication with Bluetooth-enabled computers, printers, phones, headsets, speakers, keyboards, controllers, and more Bluetooth Low Energy technology for energy-saving wireless connectivity Highly portable ultra-small design 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. Specification Type: Bluetooth Adapter Bluetooth Version: Bluetooth v4.0 Interface(s): USB 2.0 Range: 10 Metres Weight/Dimensions: 19.47 x 16 x 8.1 cm Additional Features: See Overview Package Type: Retail Package Weight: 0.0800 kg Warranty: 3 Years