The radiation we are exposed to vary from cell phone to cell phone. It is measured in W/kg(Watts per kilogram), ranging from 0.24 W/kg to about 1.49W/kg. According to the Cellular Telecommunications Industry Association, the specific absorption rate is "a way of measuring the quantity of radiofrequency energy that is absorbed by the body." The phone's maximum SAR level must be less than 1.6 W/kg in order to pass the FCC certification. According to the FCC tests the SAR level with the phone next to the ear, the highest-radiation cell phone in the United States was the Motorola V120c with 1.55 W/kg and the lowest-radiation cell phone was the Qualcomm pdQ-1900 with 0.2634 W/kg. These levels of radiation were based on the digital rating of these models. Depending on how close the cell phone antenna is to the head, as much as 60 percent of the microwave radiation is absorbed by and actually penetrates the area around the head. Some reaches an inch to an inch-and-a-half into the brain. Some illnesses due to cell phone radiation include: cancer, brain tumors, Alzheimer's, Parkinson's, fatigue, and headaches. The following shows the electromagnetic spectrum.