Hello V(very) S (sick) If you cannot beleive what you cannot see, how should i beleive that you have intelligence in your brain? Why dont you put it on table take a photograph of it and post it on Rediff Board. Where it is written in Koran that all modern convinient equipemnts which you people use to , not existing at time of Maha-mad,are permissible in islam. But why not electronic individual alaram for Azan? Why loud speakers only ? There lacs of VS - very sick people like you ? Stupid for sake of being naturally stupid