Kenwood BT7539U Bluetooth 1.70 update released

Kenwood have just released an update to the Bluetooth handsfree for the KDC-BT7539U, KDC-BT8041U, KDC-BT8141UY, KDC-BT838U models. This update takes the Bluetooth version to 1.70. You can directly download the update instructions, flashing tool, and new firmware.