Kinivo BTD400 Bluetooth USB Adapter for Windows XP,  Windows 7/Vista, Windows 8/8.1 Size name:BTD400   The Kinivo BTD-400 Bluetooth USB Adapter lets you communicate wirelessly with Bluetooth devices such as cell phones, PDAs, mice, keyboards etc. Highly Portable: BTD-400 is highly portable due to its petite dimensions. It seamlessly gets plugged into a computer/laptop without blocking surrounding USB ports. Compatibility and Specifications: BTD-400 transforms any computer with a USB port to a Bluetooth enabled computer. Built with the latest Bluetooth specification v4.0 Class 2. Supports all common Bluetooth (wireless) peripherals - keyboards, mice, headsets, stereo headphones, etc. Backwards compatible with Bluetooth versions 2.1/2.0/3.0. Compatible with Windows 10/8.1/8/Windows 7/Vista/XP. Not compatible with Mac OS. Consumes very low power from the host PC.Note: For Windows 10, please use windows drivers instead of Broadcom drivers. Easy to use instructions are available on Kinivo support website. Note: Windows 8 and Windows 8.1 automatically finds and installs the latest drivers when the BTD-400 dongle is plugged in for the first time. Windows 7/Vista/XP users need to use the included CD (or online links) to install the drivers. What's in the Box. Kinivo BTD-400 Bluetooth USB Adapter. Installation CD for Windows 7/Vista/XP (Not needed for Windows 10 /8.1: sunglasses: User Manual, Warranty. Kinivo BTD-400 USB Bluetooth Adapter is backed by our 2 year limited hardware warranty.