Thank you for viewing! Everything functions without any issues. The built-in rechargeable battery lasts for a week on a full charge. (Depending on usage) The wrist size is approximately 15-20cm. The exterior shows slight scratches on the sides of the main body from normal use. There are no major damages such as dents or drops. *The degree of scratches is subjective. Please purchase only if you agree with the description and photos. *To prevent product substitution, please only purchase if you are able to return the original item in case of any issues. Below is the product information. Brand...Fitbit Model Name...Inspire 3 Accessories...Charging cable