Using a smartphone, it can affect the body. Because the machine is compact smartphone. Font is small. Makes it difficult to screen Many people have drooping
Using a Smartphone, it can affect the body as a machine, the Smartphone is small. The letters are small. Keep looking at the screen difficult. Many people need to bend the neck
To use a smartphone, it can affect your body, because it is a small letter, smartphones are small in size with many people become more difficult to look at the screen, it must be bent neck