I used it a few times, but the alarm went off frequently when I was lying on my stomach, so I stopped using it and stored it away. I hadn't charged it for a while, so when I checked its operation for the listing, the charging lamp didn't come on easily. I left it plugged in, and after a while, it charged and worked. The third photo shows the device after being plugged in for about an hour, and then the charging cord was reconnected. The fourth photo was taken after I checked the operation in the morning and then plugged it into the charger. Because of this, I've priced it a little lower. I haven't used it on diapers, so I haven't been able to confirm that function. Other functions have been confirmed. Please check the photos. I used it on my abdomen over my clothes. Therefore, there are some fibers from the clothing attached. Please understand that this is a used item. If you are not in a hurry, please consider purchasing. I am lowering the price daily, so I am not offering discounts.