(1)This user's manualincludes the of use and notes of the product, Before using product ,please read this manual in detail for pitting Sound level meter to good use. 
(2)Do not use this sound level meter ininflammable and explosive environment.
(3)please detail with sound level meter in accordance with the relevant national or local law when it's scrapped.
(4) when sound level meter is out of work or do not know how to use it,please contact the local dealers or manufacture

Description  

Operation modes:

1. General Notes:   Press or slide locking switch to turn laser tool ON;short press to turn laser tool OFF when the laser tool is locked with pendulum.

2. Self-leveling Mode :(1) It is enabled when the laser tool is switched to the unlocked position.

(2)It has laser beam(s) blink fast at 2 Hz when tool is out of self-leveling range.

(3)It allows proper use of tool's full time pulse mode with laser detector.

3. Manual Mode :(1)It is enabled when the pendulum lock is in its locked position to position the laser tool at various angles to project non-level straight lines.

(2) It disables self-leveling operations; Accuracy of the beam(s) is not guaranteed to be level, and laser beam(s) will blink about every 5 seconds.