Pikusport is an FDA registered device which is 100% safe to use. It produces only non-ionising Bluetooth Low Energy waves from its tail which always remains outside the body. Bluetooth devices are extremely low powered - approximately 10,000 times less than a regular smartphone. It is due to this fact that lots of wireless healthcare and medical devices use Bluetooth. Moreover, Perifit uses Bluetooth Low Energy, which offers an even lower emission than standard Bluetooth. Click on the link to learn more about non-ionising radiation.