4th generation iPod touch MC540J/AFunctionality has been confirmed, but as it has been stored for many years, there may be some malfunctions.While I haven't noticed any battery degradation, some degree of deterioration is likely.Please purchase understanding that this is a used item.There is a small chip on the upper left side of the device.Please refer to the photos.CategoryElectronics > Tablets & E-readersSizeN/ABrandNoneConditionFair