Thank you for your interest in the product. Please read the following before purchasing. 【Product Description】 Brand/Manufacturer: VALKEE Model Number: VALKEE2 This is a gadget developed by a Finnish company. The key feature is that white light of 10,000 lux is emitted from the tip of the earphones. It is said to be effective in alleviating jet lag and improving sleep quality. It was also introduced on the Magazine House website: https://magazineworld.jp/anan/anan-karada/catalog-2149/ "The ears, which are more sensitive than the eyes, efficiently deliver light to the brain, producing the same effect as being exposed to sunlight. Then, the brain adjusts the misalignment of the internal clock and secretes hormones that shift to an active mode. Supports a refreshing awakening from the ears!" Official website: http://valkeejapan.com/ The following is an explanation from the official website: "Valkee allows you to easily and efficiently bathe your brain with light from your ears anytime, anywhere, just like a mobile phone or music player. The brain needs an appropriate amount of light every day. Valkee efficiently supplies the brain with the amount of light that is often lacking in modern people who are under a lot of stress, from the ears, thereby adjusting the mood and physical condition, and supporting "easy sleep and refreshing awakening." 【Product Condition】 Used by a private individual. Each part has been disinfected with alcohol. No box or instruction manual (lost). A printed translation of the English instruction manual (with the original text) will be attached (this is a personal translation and the content is not guaranteed). 【Other】 Please note that returns and claims are not accepted. Regardless of the standard accessories and optional items of the product, items not listed or shown in the photos are not included, so please be sure to check before bidding. 【Shipping】 Recycled materials are used for the packaging materials used for shipping. 【Other】 Please be sure to read the self-introduction section. Thank you. Please ask if you have any questions. I have a dog. I pay attention to the mixing of dog hair, but it is sometimes difficult to make it completely "0". If you are concerned about this, please refrain from bidding.