This is the Panasonic add-on handset "KX-FKD556-W". I've forgotten when I purchased it. I stored it away almost without using it, so I think the condition is good! Please judge the detailed condition from the photos. I will ship it via Takkyubin Compact. Please check the compatible main unit on the manufacturer's website, etc. This is an add-on handset for personal fax machines and cordless phones. The available functions vary depending on the main unit you are using. * Uses 1.9GHz wireless communication. It cannot be used with all 2.4GHz devices. Thank you. T14-17ST