Brand NEW! The Bluetooth 4.0 USB Adapter from ASUS is a portable adapter which enables wireless communication with Bluetooth-enabled computers, printers, phones, headsets, speakers, keyboards, controllers, and more. It is backwards compatible with Bluetooth 2.0/2.1/3.0. This adapter supports Bluetooth Low Energy technology for energy-saving wireless connectivity. Versatile and Energy Efficient The USB adapter is a Bluetooth Smart Ready USB adapter with Bluetooth 4.0 capabilities. It supports Bluetooth Low Energy (BLE) technology to reduce power consumption. In dual mode, the USB adapter maintains full backwards compatibility with Bluetooth 2.0, 2.1, and 3.0. Multiple Device Connectivity The USB adapter provides 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. ASUS USB-BT400 Specs Standard Bluetooth V4.0 Interface USB 2.0 Data Rate Up to 3 Mb/s Wireless Range Over 32' (10 m) in free space Frequency Band 2.4 ~ 2.4835 GHz unlicensed ISM band Spectrum System FHSS (Frequency Hopping Spread Spectrum) Modulation GFSK for 1 Mb/s ?/4-DQPSK for 2 Mb/s 8-DPSK for 3 Mb/s OS Support Windows 8 (32-bit/64-bit) Windows 7 (32-bit/64-bit) Windows XP (32-bit/64-bit) Profile/Protocol Support 4.0 Host Controller Interface Advanced Audio Distribution Profile AMP Host Controller Interface AMP Manager Protocol Attribute Protocol Audio/Video Control Transport Protocol Audio/Video Distribution Transport Protocol Audio/Video Remote Control Profile Basic Imaging Profile Basic Printing Profile 1.2 Bluetooth Network Encapsulation Protocol Device ID Profile Dial-Up Networking Profile File Transfer Profile Find Me Profile Generic Access Profile Generic Attribute Profile Generic Audio/Video Distribution Profile Hands-Free Profile Hardcopy Cable Replacement Profile Headset Profile Host Controller Interface Human Interface Device Interoperability Test Specification Logical Link Control and Adaptation Protocol Message Access Profile Object Push Profile Personal Area Networking Profile Phone Book Access Profile Proximity Profile RFCOMM with TS 07.10 Security Manager Protocol Serial Port Profile Service Discovery Application Profile Service Discovery Protocol Synchronization Profile Video Distribution Profile Dimensions (W x H x D) 0.76 x 0.31 x 0.62"(19.47 x 8.10 x 16.00 mm) Weight 0.07 oz (2.20 g) Packaging Info Package Weight 0.2 lb Box Dimensions (LxWxH) 6.0 x 5.9 x 1.0" - All international buyers are responsible for all tax, duties and/or customs fees.