KOSTH Standard Tuning Fork A (A=440Hz) This is the KOSTH standard tuning fork A, perfect for music education, tuning, and sound confirmation. It allows for reliable tuning and is ideal for setting the reference pitch for instruments like guitars and pianos. 【Features】 Frequency: A=440Hz Clear and stable sound Lightweight and compact, easy to carry Suitable for beginners to professionals 【Condition】 With case, no noticeable scratches or stains 【Usage Scenarios】 ・Instrument tuning (guitar, piano, wind instruments, etc.) ・Ear training ・Music classes in schools and music schools ・Healing and sound experiments 【About the Product】 ○Free shipping ○Instant purchase OK ○Shipped via Rakuraku Mercari (anonymous shipping). Yamato guarantee included. ○Generally ships within 24 hours of purchase. ○Ships from Hyogo Prefecture. 【Notes】 ・I do not have much knowledge about this product, so I may not be able to answer detailed questions. ・Everything in the photos is included. Please note that there may be slight color differences due to the use of a smartphone or other devices for photography. If there is a discrepancy between the photos and the text, please consider the photos to be correct. ・There are some scratches. ・Product details are based on my own research and information, so there may be some errors. Please understand this. (Please prioritize the product information in the photos) ・Please consider this item as having been handled by a person once. Please refrain from purchasing if you are overly sensitive.