USB Bluetooth Dongle v4.0, Class 2 supports latest Bluetooth technology version 4.0, called "Smart Ready". It is highly required, if user want to connect a low power Bluetooth 4.0 device (e.g. smart watches, heart rate monitor) with their notebook, netbook, ultraboook etc. Most of current computers and millions of existing computers do not support bluetooth 4.0. Users must have this dongle to upgrade their systems, if they want to connect with Bluetooth 4.0 hardware! * Operation range: up to 20m * Bluetooth Version v4.0 * Dual mode operation v4.0 and older versions * Supports Bluetooth low energy * Data rate up to 3 Mbit/s * Bluetooth-Software on CD. Supports all popular BT-profiles * High security due to encryption and authentification * Easy and quick connection * Function-LED * For Windows 10, 8, 7, XP, Vista