Question:
Lock/Unlock function settings for HRF-IV550MD（G）
Answer:
When the display panel is unlocked, press “Lock/Unlock” button for 3 seconds, with the sound of buzzer and the light of “Lock icon”, the display panel will be locked. When the display panel is locked, press “Lock/Unlock” button for 3 seconds, with the sound of buzzer and the going out of “Lock icon”, the display panel will be unlock.
