The connectBlue Bluetooth Serial Port Module OBS421 supports the Serial Port Profile (SPP) for fast and secure transparent serial data transmissions. The module has a small form factor, low build height, and supports Bluetooth 2.1+EDR. Via an upcoming firmware upgrade, the module is prepared for Bluetooth 4.0 including Bluetooth low energy technology. With the Bluetooth stack embedded, you can be up and running quickly as there is no need for a driver or stack in your host. The module is fully Bluetooth qualified and radio type approved for Europe, Japan, US, and Canada. It also has the connectBlue standard interface for compatibility over time and radio technologies.