HIFEM utilizes a focused electromagnetic field that penetrates to the depth of 7-10 cm depending on the applicator and is important to stimulate a large volume of the target muscles. HIFEM is intended for major muscle groups such as gluteal muscles, abdominals, etc. HIFES, however, is intended to stimulate delicate and superficial facial muscles. HIFES utilizes high-intensity electric fields to engage superficial facial muscles. These muscles require less depth of penetration and volumetric stimulation- such as the Frontalis muscle, Zygomaticus major, Zygomaticus minor, and Risorius.