Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for a deep,...

https://qqpipi.com//index.php/Is_Ultherapy_Safe_Around_Nerves_and_Bone_Because_of_Imaging%3F

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer for a deep, natural lift, with results peaking around 3 to 6 months. RF heats skin between 40 to 45°C mainly for collagen tightening but less depth