text: Opponents say that hands-free set is safety because people can drive using two hands. However, hands-free devices don't eliminate the risk of causing an accident and even may it worsen by suggesting that the behavior is safe. Researches show that using headset can be as dangerous as holding a phone because the conversations distracts drivers from focusing on the road. Scientists had proven that people talking over the phone image person who they talking to and that doesn't interfere with driving. The problem is when a car swerves unexpectedly or pedestrian step into traffic, and the mind lacks the processing power to react in time. So, the problem isn't in holding the wheel and cell phone at the same time what may cause an accident because of lack man oeuvre, it is because of conversation and lack of reaction at the particularly time.