This is an electronic tuner for guitars made by Giannini. It features a large, easy-to-read display, making it easy to see the tuning status. Although it is a new, unused item, it has been stored for a long time, so the remaining battery life of the built-in battery has not been confirmed. Since the operation has not been confirmed, please understand this before purchasing. Recommended for guitar practice, as a spare, or as a collector's item. There may be minor scratches due to storage, but it is an unused item.