The paper discusses the use of a spin-polarized electrical current to drive microwave oscillations in a nanomagnet. The authors demonstrate a technique to directly measure microwave-frequency dynamics in individual nanomagnets using a DC spin-polarized current. They show that this method can produce several different types of magnetic excitations, including small-angle elliptical precession and large-amplitude dynamical regimes. The microwave power generated by the precessing nanomagnet can be significant, suggesting potential applications as a nanoscale microwave source or oscillator. The study provides insights into the nature of magnetic excitations driven by spin transfer and the conditions under which they occur.The paper discusses the use of a spin-polarized electrical current to drive microwave oscillations in a nanomagnet. The authors demonstrate a technique to directly measure microwave-frequency dynamics in individual nanomagnets using a DC spin-polarized current. They show that this method can produce several different types of magnetic excitations, including small-angle elliptical precession and large-amplitude dynamical regimes. The microwave power generated by the precessing nanomagnet can be significant, suggesting potential applications as a nanoscale microwave source or oscillator. The study provides insights into the nature of magnetic excitations driven by spin transfer and the conditions under which they occur.