The YAMAN ultrasonic HC-21B is a device specifically designed for hair care. How to use it: ① Wash your hair: Wash your hair with shampoo and apply a treatment. ② Clamp the plate: Take a small section of hair and clamp it in the center of the plate where the treatment has been applied. ③ Slide to the ends: While clamped, slide straight down towards the ends of your hair. ④ Ultrasonic and LED stop: After 10 seconds, the ultrasonic function stops, and the LED plate turns off to prevent over-treatment. ⑤ Repeat: Repeat the same process on all sections of your hair to allow the treatment to penetrate the hair. Additional Information: Shine Pro uses a triple approach of ultrasonic waves, heat, and red LED to penetrate the treatment into the hair, leading to beautiful, shiny hair. The plate temperature is approximately 50°C, designed to minimize the risk of burns. Counterfeit YAMAN hair irons can be identified by purchasing outside of official stores, the logo and printing on the device, low quality, and the presence or absence of a serial number. In particular, the serial number printed on the device can only be confirmed on genuine products. When purchasing on flea market apps, ask the seller to provide the serial number and check with the official store to confirm that the product was sold through legitimate channels. The serial number photo is attached in the 8th image, please check it. Also, I purchased it through official channels. Used 3-4 times. Power tested. - Brand: YAMAN - Product Name: Beauty Device - Country of Manufacture: China - Model Number: HC-21B - Retail Price: ¥27,500 (excluding tax) Thank you for viewing.