Thank you for viewing. This product was purchased in 2020 on Mercari as a used item in good condition (purchased in 2018). I used it during three pregnancies, with my first, second, and third children, and am now selling it as I no longer need it. The main unit only. Operation has been confirmed. The box, batteries, instruction manual, and pouch are not included. Please use it by placing it in a maternity belt or similar. There is no instruction manual, so please research how to use it online. There are no noticeable scratches or stains, but please refrain from purchasing if you are sensitive to such things. This is a used item, so please understand this before purchasing. The following is a quote: 【What is BabyPlus?】 BabyPlus, the world's first scientific prenatal education system developed by doctors based on over 20 years of research, is designed to allow the baby to listen to 16 scientifically developed sounds daily according to a lesson schedule. These sounds are synthesized based on the "mother's heartbeat" - the "language" that the baby in the womb understands best - which is naturally heard in the mother's womb. As the lessons progress, these "heartbeat-like sounds" gradually become more complex, and the baby begins to develop the ability to distinguish sounds and learn by recognizing "Oh, that sounds different from Mom," and "Oh, that sound again." 【What are the effects of BabyPlus?】 Research shows that children raised with BabyPlus prenatal education are generally calm, cry less at night/unnecessarily, are good at self-soothing (e.g., sucking their fingers), are sociable and unafraid of new environments, adapt quickly to group life, are intellectually curious, and have a long attention span, among other things.