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light or when the light source of the laser instrument is distant.
Do not stare into beam or directly observe the laser beam via an optical instrument or
set the instrument at the eye level (to avoid damage to the eyes).
Do not disassemble the laser instrument without authorization.
Do not refit the instrument without authorization in any way; otherwise it may
cause harmful laser radiation exposure.
Do not use the laser instrument around children or allow them to use it.
Exposure to Class 2 lasers for no more than 2 seconds is generally considered
safe, because natural eyelid reflexes (blinking) usually can provide adequate
protection.
4. Operation Instructions
When the laser instrument is in the locked state, toggle the pendulum lock to the
unlocked position to start the self-inspection. After completing the self-inspection,
the horizontal laser line is always on, and the instrument is in the self-leveling
mode. In the self-leveling range of 3°±1°, the instrument will perform the
self-leveling function. If the range is exceeded, the instrument will flash quickly
and make a beeping sound.
Press the H button to turn on/off the horizontal laser line, and press the V button
to turn on/off the vertical laser line.
(The two horizontal/vertical laser lines can be used alone or together).
In the power-on state, toggle the pendulum lock to the locked position again, and
the instrument can be turned off.
Note: It is to ensure that users must toggle the pendulum lock to the locked
position before shutting down the instrument.
When the instrument is in use, the charging/power indicator is off. When the
battery power is 20% remaining, the charging/power indicator will flash in red
color, and the instrument will automatically shut down after it is fully discharged.
When the battery pack is being charged, the charging/power indicator will flash in
red color to remind users that the instrument is being charged. When fully
charged, the charging/power indicator will switch to a steady green state. When
directly using the charging interface on the instrument to charge, the green light
will flash, and when it is fully charged, the indicator will switch to a steady green
state.
5. Manual Mode
In the shutdown state, press and hold the V button for more than 3 seconds to enter
the manual mode. At this time, the instrument is turned on and emits a horizontal laser
line. The lock indicator is always on, and the laser line will flash once every five
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