Asus X553M E-manual

Also see for A553M: User guide

Notebook PC E-Manual9Safety precautionsUsing your Notebook PCThis Notebook PC should only be used inenvironments with ambient temperatures between5°C (41°F) and 35°C (95°F).Refer to the rating label on the bottom of yourNotebook PC and ensure that your power adaptercomplies with this rating.Do not leave your Notebook PC on your lap or nearany part of your body to prevent discomfort orinjury from heat exposure.Do not use damaged power cords, accessories, andother peripherals with your Notebook PC.While powered on, ensure that you do not carry orcover your Notebook PC with any materials that canreduce air circulation.Do not place your Notebook PC on uneven orunstable work surfaces.You can send your Notebook PC through x-raymachines (used on items placed on conveyor belts),but do not expose them to magnetic detectors andwands.Contact your airline provider to learn about relatedin-flight services that can be used and restrictionsthat must be followed when using your NotebookPC in-flight.