Except for mobile phones and laptops, nothing is allowed. The authority will just overlook certain gadgets like blow dryers, irons, hot plates, etc during the inspection which is not less than a raid. Gadgets like air coolers, air conditioners, refrigerators which consume a lot of electricity are not allowed.

However, to be frank you have nothing to fear. During any inspection, you will find the library crowded as all the students lock their rooms and sit there.