Applicable models
HORIZON Ultra（Firmware version lower than V3.12.246）
HORIZON Pro
HORIZON
Elfin
Halo+
AURA
Videos:
Deutsch: http://youtube.com/watch?v=Vho_kH9kD3w
Allemand: http://youtube.com/watch?v=7uaNsE5ECQc
German: http://youtube.com/watch?v=xzr0IeymPX0