•  
Wireless devices may interfere with the airplane's flight 
system. Do not use your device where wireless devices 
are not allowed according to the airplane company's 
regulations. 
Operating environment
•  
Avoid dusty, damp, or dirty environments. Avoid 
magnetic fields. Using the device in these environments 
may result in circuit malfunctions.
•  
Do not use your device during thunderstorms to protect 
your device against any danger caused by lightning. 
•  
Ideal operating temperatures are 0 °C to 35 °C. Ideal 
storage temperatures are -20 °C to +45 °C. Extreme heat 
or cold may damage your device or accessories.
•  
Do not expose your device to direct sunlight (such as on a 
car dashboard) for prolonged periods. 
•  
To protect your device or accessories from fire or 
electrical shock hazards, avoid rain and moisture.
•  
Keep the device away from sources of heat and fire, such 
as a heater, microwave oven, stove, water heater, 
radiator, or candle.
•  
Do not place sharp metal objects, such as pins, near the 
earpiece or speaker. The earpiece may attract these 
objects and result in injury. 
•  
Stop using your device or applications for a while if the 
device is overheated. If skin is exposed to an overheated 
device for an extended period, low temperature burn 
symptoms, such as red spots and darker pigmentation, 
may occur.