Bluetooth and NFC enabled body composition scale Simply stepping on the scale measures weight, BMI, basal metabolism, body age, skeletal muscle percentage, visceral fat level, and body fat percentage. This makes it more enjoyable to use and helps to increase motivation compared to a scale that only measures weight. There are no operational issues. * To turn on the power, touch the "━" in the center. * The back button is only for use when you have incorrectly confirmed your personal number; it will not function otherwise. For further details on how to use the scale, please refer to the instruction manual on the manufacturer's website. There are no noticeable scratches, but if you look closely at the fifth photo, there appears to be some dust or dirt inside the glass in the center of the monitor. It's barely noticeable, and as you can see in the other images, it doesn't affect the display. However, some people may be concerned, so please only purchase if you are comfortable with this. There is also a slight scratch on the lower left of the back (it is not a deep scratch). The batteries will be included. * The round light reflected in the photos is from the fluorescent light; it is not actually present. Thank you for your understanding. Thank you.