Class 2 supports Bluetooth technology version 4.0, known as Smart Ready. It is essential for users who want to connect low power Bluetooth 4.0 devices (e.g., smart watches, heart rate monitors) with their notebook, netbook, or ultrabook. Most current computers and millions of existing computers do not support Bluetooth 4.0. Users must have this dongle to upgrade their systems if they wish to connect with Bluetooth 4.0 hardware. The operating range is up to 20 meters. Bluetooth version 4.0. Dual mode operation supports both version 4.0 and older versions. It supports Bluetooth low energy and has a data rate of up to 3 Mbit/s. Bluetooth software is included on CD and supports all popular Bluetooth profiles. It offers high security due to encryption and authentication, ensuring easy and quick connection. The device features a function LED and is compatible with Windows 10, 8, 7, XP, and Vista.