Super-Slim Flush Design Bluetooth ExpressCard Notebook Laptop Adapter with a Built-in Recractable Antenna for better transmission signal - Flushes Fully Inside the Laptop Provide with usb 2.0 and bluetooth function Fully compliant with usb 2.0/1.1/1.0 Bluetooth specification V2.0&1.2 compliant Transfer rates of 1.5/12/480 Mbps of the USB port,bluetooth symbol rate up to 3Mbps Supports windows 98SE,ME,2000XP and Vista