None of these technologies use radio waves. None of these technologies use lower-frequency microwaves. None of these technologies use higher-frequency microwaves. None of these technologies use infrared waves. The radiation emitted by some wireless local area networks has the shortest wavelength of all the technologies listed above. All these technologies emit waves with a wavelength in the range 0.10 to 10.0 cm. All the technologies emit waves with a wavelength in the range 0.01 to 10.0 km.