Prokit's Industries MT-4018 - Manual (Page 2)

■. Introduction
Please read the following information carefully
before using the meter. The Sound Level Meter has
been designed to measure sound level for various
environments. It is used to detect noise, music level
or sound engineering...
1.1 Precautions safety measures
Please use it according to the following usage.
Environment conditions:
● Altitude: less than 2000 meters.
● Relatively humidity 80% max
● Operation temperature 0~40℃
Maintenance & save:
Do not clear the meter using alcohol and impregnant.
if you do not use it for a long time, please take out the
battery and place the instrument in a dry surrounding.
Safety symbols:
Meter is protected by double insulation