Lenco TAB-740 - Manual (Page 9)

5.2.6 icon is the channel information button, press the button, it will
press Channel Information ,it include Channel name, Frequency, Signal
Strength, Signal Quality, Video PID, Audio PID .
5.2.7 icon is the audio track button
5.2.8 icon is the setting button, press the button you can .
5. 3. DVB setting menu
It include Audio Track、Channel Search、Factory data reset、Set
password、Update system time、 TTX Region、LCN item.
8