Emitting ultra-short nanosecond pulses of peak energy, the technology aligns precisely with the thermal relaxation time (TRT) of targeted pigment granules. By combining synergistic photothermal and photoacoustic interactions, it achieves selective mechanical shattering of pigment structures while restricting heat spread to neighboring tissues. Consequently, Q-switched technology remains a foundational, clinically proven gold standard for addressing dermal pigmentation disorders.