8
9
Indicator Light
（
HT-A3
）
Brightness adjustment of the display screen: Under
the power-on state, press and hold the “ ” key to adjust the
brightness. Each long press adjusts the brightness by 1 level.
Status
Power on
Power off
Not being charged
Blue
None
In charging
Red blue (purple)
Red
Fully charged
Blue
None
Normal
The magnification function may be utilized when remote objective
is photographed so as to observe the objective clearly.
The effect picture is as follows:
Use USB data line to charge:
This product has a built-in rechargeable battery.
When the battery is low, please charge it in time via the Micro USB
port.
After fully charged, unplug the USB cable.
Note: When the battery is completely empty, there will be an
abnormality. It is recommended to use the battery when it is
sufficient.
Application of Amplification
Battery Charging Instructions
+
-
2X
4X
（
HT-A4
）
The brightness adjustment of the display screen: In
the power-on state, long press the " " key to increase the
brightness, long press the " " key to decrease the
brightness, and adjust the brightness level 1 for each long
press.
（
HT-A3
）
Laser light on / off: In the power-on state, press and
hold the “ ” key to turn on the laser light, and long press it
again to turn it off.
Diopter adjustment: Rotate the diopter adjustment button left
and right to adjust the diopter for yourself.
Focusable lens: Rotate the focus lens button left and right to
focus. Rotate clockwise for near focus and counterclockwise
for far focus.
+
-
