This is the indoor coverage technology of mobile communication, which uses a repeater, a low-power relay access device and a low-power antenna. Generally, the power is only a few watts, mainly to ensure that people in the elevator can make phone calls and surf the Internet. After passing through your wall, the signal intensity will be attenuated a lot, and it will be attenuated several times for each additional layer. As long as the bed in your bedroom is not next to the elevator shaft, it will be radiated by the antenna all night, otherwise there will be no big health problems, because.