suggest for indoor use, dry location. Battery charging 0-45°C, Playing 0-50°C Use only standard USB port certified according to IEC60950-1 as LPS or IEC62368-1 as PS2. 15. To protect you and your property against damage due to explosion of internal battery don`t throught the battery into fire, water or similar liquid. 16. The hanging up height shall not exceed 2m. The ceiling mount means shall withstand 4 times of the weight of the equipment.