I used it only once, but since my hair is short and I don't use it much, I'm selling it. The high-performance MEDULLA SONIC-SHINE PRO has a compact design and is convenient to carry. - Model Name: MEDULLA SONIC-SHINE PRO - Power: 7.4W - Size: 36mm x 41mm x 278mm - Weight: 384g - Voltage: 5.0V - Accessories: 1 USB cable, 1 instruction manual 【Achieve the Ultimate in Self-Care】From the MEDULLA series, which has sold a total of 5 million units, a new ultrasonic iron exclusively for treatment has arrived. Easily achieve salon-quality ultrasonic treatment at home. 【1 Million Vibrations Per Second】Ultrasonic vibrations of 1 million times per second nano-size the treatment, significantly boosting the penetration power of the treatment. Achieve bouncy, smooth, and resilient hair. 【Authentic Care Anytime, Anywhere】Because it's a cordless and waterproof "IPX5" ultrasonic iron, you can perform authentic ultrasonic treatment both in and out of the bath. 【LED x Ultrasonic for Ultimate Penetration】470nm blue LED and 1 million ultrasonic vibrations per second allow the treatment to penetrate thoroughly into each strand of hair. 【How to Use】After shampooing, apply treatment. Iron from the roots to the ends of your hair for about 10 seconds, taking your time to allow the treatment to penetrate. If it's a rinse-out treatment, rinse with a shower. If it's a leave-in treatment, dry with a hairdryer to finish. Thank you for viewing.