Scientists are warning against the constant use of mobile phones, lap tops, tablets and other wireless devices.
They claim too much electromagnetic radiation is being emitted from them which could be a reason for rising cancer rates and an increase in autism and obesity.
Nearly 200 experts are calling on the UN to provide guidelines as they say the radiation is damaging DNA in our cells.
Their advice is to turn off devices when not in use.
The scientists, from 39 different countries, are from a group called the International EMF Scientist Appeal.
More information about the EMF group can be found here.
A description of the appeal can be found here.