Sensation during treatment, Most people describe PMU (like brows, lips, or eyeliner) as: * A scratching, tingling, or vibrating feeling * Mild to moderate discomfort rather than sharp pain * More New Portable Finger Joint Cordless Vibrating Electric Hand Massager Machine Masajeador De Manos With Heat and Compression Garter Belts Bloomingdale's Cordelia Garter Belt Red For Love & Lemons 128Hz is a low frequency vibration used in sound based practices. Because it travels deeply through the body, its commonly described as grounding and steady. Many people notice it through sensation