February 2023

Updated the firmware version of the BT-A700 Series.
Updated the firmware version of the BT-A500 Series.
The related manuals have been revised in accordance with the above version update.

February 2022

Updated the firmware version of the BT-A500 Series.
The related manuals have been revised in accordance with the above version upgrade.

October 2021

Updated the firmware version of the BT-A500 Series.
The related manuals have been revised in accordance with the above version upgrade.

March 2021

Opened the updated BT Series User Support website