High-intensity focused ultrasound (HIFU) is a relatively new cosmetic treatment for skin tightening that some consider a noninvasive and painless replacement for facelifts. It uses ultrasound energy to encourage the production of collagen, which results in firmer skin.
The HIFU machine we use is ONETHERA made in Korea. 
ONETHERA is a lifting equipment that reduces pain by emitting Long-pulsed Type ultrasound waves, unlike conventional HIFUs.
This refers to a device that increases the elasticity of the skin with ultra-high-intensity ultrasonic energy.

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Effect & maintenance period
Visible effects are facial V-line, fine wrinkles, and skin tone improvement. Although there are individual differences, it is said that the most noticeable effect can be seen after 1-3 weeks. 
Depending on how well you take care of it, the effect can be maintained for 3 to 6 months. It is recommended once every two months for steady skin firming and anti-aging.