Nowadays wireless technology is found everywhere, tablets, laptops, keyboards, mice, phones, the list goes on.
History
You could say wireless technology has been around since the battery was invented, which would be true, except that the battery is just an alternative power source. But what about technology that used to have to be connected to a computer/phone/tablet etc. to work? The first time this technology was used was in 1984, on a wireless keyboard, which worked by radio waves sending signals to the computer in front of the keyboard, which had a radio wave receiver. However this only worked if the keyboard was directly in front of the computer without any obstructions.