USB Bluetooth 4.0 Low Energy Micro Adapter Dongle with Golden Black Shell for Windows XP Vista 2003 2008 7 and 8 32 or 64 Bit/Raspberry Pi Enables your PC or laptop to wirelessly communicate with Bluetooth-enabled devices, like Smartphones, tablets, keyboards, mice, speakers, printers, headsets and more Upgrades Bluetooth support for Windows 8, 7, Visa, XP or Linux PCs. Plug and play Simplified use with an attractive user interface. An included setup CD guides you through installation and connecting with Bluetooth-enabled devices in minutes. Latest Version 4.0 Class 2 Smart Ready Adapter with Low Energy Technology, backwards compatible with earlier Bluetooth versions1.0 ,2.0 and 2.1 . Signal is more stonger than the square version.