This is a used Panasonic VL-V566 exterior door station. Basic functions such as the call button, LED light, audio, and video transmission to the main unit all work without any problems. Regarding the product condition: The camera lens has yellowed due to long-term outdoor use, causing the image to be blurry and not clearly visible. There are no other operational defects. Considering the product condition, this item is offered at a low price. Please understand that we cannot accept claims or returns. Please purchase with this in mind. Please provide a receipt evaluation after the product arrives.