Used smart changing pad. Fully functional and clean. We loved using this with our baby. We haven't needed this in a while since our child is now four. Here are the details from the website: Hatch Baby deploys technology to help you keep tabs on your baby’s development. Grow is a diaper-changing pad with a built-in, wireless smart scale. Paired it with the Grow smart phone app, and you can seamlessly track your baby’s weight gain and exactly how much they drink in each feeding. If your baby has difficulty breastfeeding or gaining weight in the early months, the Grow puts you in control of your vital medical information, instead of having to wait for the next visit to the pediatrician or lactation consultant. When your baby’s growth is on track, you’ll have instant peace of mind. If it’s not, you’ll know and can address any issues immediately. Information from the Grow scale can be instantly shared with others, which makes it a great resource for caregivers to connect with parents when they are away from the home. In addition to automatically measuring weight and feedings, you can use Grow to track your baby’s diaper changes, sleep and length, though this information needs to be manually entered. The app can also give you stats about how your baby’s growth percentiles compare to worldwide (WHO) data and other Grow babies. On the outside, the Grow has a sleek, minimalist look. The soft foam is comfortable for your baby and wipes clean easily.