Kara, Taylor and Keeva will reflexively absorb any radiation they encounter, and will never be harmed from it. This can range from dangerous alpha, beta and gamma radiation, including those produced by radiokinesis and induced radioactivity, to microwave radiation and simple infra-red heat radiation. They will then automatically convert the radiation energy into physical strength, and will be able to perform tasks which normal humans would find impossible. They will be able to store the energy for a small amount of time, and therefore won't always need the radiation to be immediately available, but the energy will dissipate the longer it is stored for.