A Korean favorite. The Derma W Skin Spatula is not your average skin spatula.  With smart skin analyzer it has the ability to read hydration levels in real time by measuring the electrical resistance of your skin.  In addition to this unique feature, it also has three modalities: cleansing, nutrition and firm mode.  Cleansing Mode: the powerful oscillation (30,000-33,000hZ) creates ultrasonic waves which loosen and draw excess debris from pores as it slides over skin.  Nutrition: this mode enables water-soluble ingredients like vitamin c to penetrate deeper into the skin.  Firming: best for fat-soluble ingredients, like retinol, to help increase absorption Please note: On the back of the skin spatula is a gold circle. Make sure to touch this terminal when using the nutrition or firm mode. The Skin Analyzer works in conjunction with a free app, which is shared in the instruction manual.