System Overview 2-21 
2No.
Name  Description  Function 
<50>  / 
Multifunctional 
knob 
Rotate to adjust image parameters or direction of 
comment arrows. 
Press to show the menu, rotate to select the 
item. 
<51>  /  Indicator 1 
Indicates if the main unit is connected to the 
power supply. 
If not connected, the indicator does not 
illuminate. 
If connected, the indicator illuminates in green 
color. 
<52>  /  Indicator 2 
Indicates the current status of the batteries. 
When the system is supplied with power by the 
batteries and the power capacity is lower than 
30%, the indicator is yellow and flashes. 
When the batteries are being charged, the 
indicator light is on and in yellow color. 
When the battery capacity is charged to the full 
capacity, the indicator color turns green. 
In other statuses, the indicator light is off. 
Tip: ā/ā means the key / knob has no silk-printed name. 
2.10  Symbols 
This system uses the symbols listed in the following table, and their meanings are 
explained as well. 
No.
Symbol  Description 
1 
 
Type-BF applied part 
2 
 
General warning, caution, risk of danger 
3 
 
Dangerous voltage 
4 
 
No user serviceable parts (applied to the power adapter) 
5 
 
Indoor, dry location use only (applied to the power adapter) 
6 
 
Power button 
7 
 
Probe port 
8 
 
Network port 
9 
 
USB port 
10 
 
S-VIDEO signal interface; 
VIDEO signal interface 
11 
 
AC (Alternating current)