This is a new, unopened item. It has been opened for photography, so I will consider it as a new, unused item. I purchased it, but I will not be using it, so I am putting it up for sale. For shipping, I will not send the outer box due to shipping costs. Instead, I will wrap the item in bubble wrap as shown in photo 10, place it in a waterproof bag, and ship it via Yu-Packet Post. Although it is a new, unused item, it is still a pre-owned item that has been handled by a person, so please refrain from purchasing if you are concerned about minor details or are looking for a perfect item. The following is a copy-paste of the product description: 2.5mm Telephone Headset: "Not for smartphones or computers" The Wantek telephone headset is compatible with most cordless DECT phones with a 2.5mm headphone jack. Just plug it in and use it. It is only compatible with specific phone models with a 2.5mm headphone jack as described (but not limited to). If your phone model is on the list, please purchase this 2.5mm plug telephone headset for your office phone. For other phones, please contact us for compatibility guidelines and suggestions. Comfortable at all times: Ultra-comfortable call center headset with an ultra-lightweight fit and adjustable headband, suitable for all head sizes, and high-quality, soft artificial leather ear cushions enhance comfort when worn all day. Built-in professional microphone mute and volume control. Clear calls: Hands-free wired telephone headphones with a 2.5 mm jack connection for broadband voice, allowing you to experience natural hearing, and headphones with a noise-canceling microphone reduce background noise, and acoustic shock protection protects your hearing. Suitable for Panasonic KX-NT136, KX-NT343, KX-NT346, KX-NT366, KX-T7603, KX-T7625, KX-T7630, KX-T7633, KX-T7636, KX-T7730, KX-T7735. Ultra-durable: Precision design, high-quality plastic, integrated headband construction, and a high-quality microphone make this office phone headset with a microphone more durable and long-lasting. This cordless phone headset can be compared to high-end office headsets such as Plantronics or Jabra.