The radiation emitted by GSM signal booster is non-ionizing radiation,which means it does not have enough energy to break chemical bonds in DNA.this type of radiation is not considered to be harmful to human health .
Ultimately, the best type of device for you will depend on your specific needs and budget. If you live in an area with poor signal reception, a signal booster is a good option. If you live in an area with good signal reception, but the signal is weak in your home or office, a signal extender may be a better option.