It is the cooling mechanism of cell phone jammer

 It is the cooling mechanism of cell phone jammer .
Mobile phone has been an effective means of communication which has solved a lot of problems and poses a lot. It is mobile as the name, you can walk around with it play with it, sleep with it, travel with it and can equally go into the rest room with it. I see it as an important means of communication which has helped in many ways including times of danger, but is this seen among the students of secondary schools these days? The answer is NO! The mobile phone instead of doing well to this young generation or the called "future leader" it has caused a lot of harm to these upcoming geniuses. The questions now is, is it advisable for secondary school students to own a mobile phone? I mean students owning a mobile phone and not making use of mobile phone.
At least some recent studies, however, have found an association between cell phone use and certain kinds of brain and salivary gland tumors. Lennart Hardell and other authors of a 2009 meta-analysis of 11 studies from peer-reviewed journals concluded that cell phone usage for at least ten years "approximately doubles the risk of being diagnosed with a brain tumor on the same ("ipsilateral") side of the head as that preferred for cell phone use."
Some students have the habit of keeping their mobile phones on during classes and studies, even in the library. The do so for their classmates to know their latest ringing tones, thereby distracting other students, even the teacher in the class. Some even put it in vibration and are distracted by the vibration from calls during classes and school hours, diverting their concentration on who is calling at the moment.
This "mobile phone" with different memory capacity is used to download and store several music of different lyrics and tones. The songs are being listened every now and then with the use of earpiece in the school and at home forgetting their academic work which is supposed to be their priority. Some even play these songs in the class, distracting the serious and minded students, while the constant use of the earpiece makes it difficult for some of them to understand conversations with low tones, and shout while talking with the aim to be heard. The academic distraction is getting worse by the day because those that don't own a mobile phone are eager to get one. Once a student brings a book to study, and a call comes, that is the end of the study after the call, because their concentration will be on the call answered.