What electronic gadget has impressed you the most

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There are a lot of electronic good s available these days and everyday new models and new technology are being impregnated into the existing gadgets.What is the best ever electronic gadget you have used and why do you like it.As for as I'm concerned there a few gadgets that are amazing in performance and in way of technology. The list goes like 1.Laptop computers 2.3G phones(Apple I-phone) 3.Blue Ray DVD and player I like the technology in the above three very much.What gadgets have impressed you,share your opinions.