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1. Environment conditions on operation:
(1) 2000 meters high below;
(2) Temperature:0~40℃ ；
(3) Relative humidity: ≤80%RH
2. Do not store or use the unit in following conditions:
(1) Splashes of water or high levels of dust.
(2) Air with high salt or sulphur content.
(3) Air with other gases or chemical materials.
(4) High temperature or humidity or direct sunlight.
3. Never impact the unit or used on humidity conditions.
IV. Other
A. Attentions
1. Maintenance of battery:
(1) When you do not use this product for a long time, you need to charge it
once a month to avoid affecting the battery life.
(2) After startup, when the power supply is insufficient, please charge it in
time.
2. Cleaning the casing:
Never use alcohol or thinner to clean the unit casing that will especially
erode the LCD surface;just clean the unit lightly as needed with little
clean water.
B. Maintenance
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