This is a new, unused item. It's a copper-made extension handset for audio. If you have a compatible main unit, how about this? This product has been discontinued. It has been stored in a warehouse. Please refrain from purchasing if you are looking for a perfect item, as it has been stored by a non-professional. Please note that we cannot confirm the operation as it is unused. Please purchase only if you understand and accept no returns/no claims. Shipping will be via Yuu Yuu Mercari delivery.