Unlike ordinary trimmers, precise sonic waves circulate 100 items per second to gently exfoliate and remove hair, leding to supreme softness and a fresh, youthful look. The thin blade helps minimize uneven skin tone, eases away rough, dry patches and triggers a higher rate of skin cell turnover. The safety guard s skin irritation. Sonic Waves; Exfoliation; Safety Guard; Hair Removal; Thin Blade.