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Operating Description
Charging: the product is provided with built-in battery. When the
battery power is not sufficient, please charge it through Micro
USB interface in time.
Power on/off: hold down “ ” key to power on /off.
Image capture: Press “
” key to capture the image. The
screen will show “ ” prompt, indicating that image capture
is successful.
（
HT-A3
）
Image review:After powering on, short press the " "
key to enter the image viewing mode (the image shows the last
imagetaken), press the " " key to view the previous image,
press the " " key to view the next image, and press the
" " key to exit Image viewing mode.
Delete image: After entering the image viewing mode, press
and hold the “ ” key to delete the currently viewed image.
Image Export: Capture and save images can be viewed and
exported via a Micro USB connection to a computer.
Mode switching: Press the " " button to switch between
the six imaging modes of rainbow, hot metal, black heat,
yellow saturation,bird watching mode and white heat.
CVBS video output: Press and hold the “ ” key to switch to
CVBS video output. Press and hold again to return to the local
display.
（
HT-A3
）
Zoom in / out: Under the power-on state, press the
“ ” key, and each time you press it, the target of “2X, 4X”
will be gradually enlarged and displayed. Press again to return
to the normal state.
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（
HT-A4
）
Image review:After powering on, short press the " "
key to enter the image viewing mode (the image shows the last
image taken), press the " " key to view the previous image,
press the " " key to view the next image, and press the
" " key to exit Image viewing mode.
+
-
（
HT-A4
）
Zoom in/out: In the power-on state, press the " "
key, and the target of "2X, 4X" will appear gradually enlarged
and displayed every time you press it. When the target is
maximized, press " " to zoom out 2X, 1X (the zoom out
function can only be used after the image is enlarged).
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