This is the BOSS personal headphone guitar amplifier "KATANA:GO". It supports both guitar and bass, allowing you to easily enjoy high-quality sound. Perfect for practicing at home or playing on the go. [Brand] BOSS [Model] KATANA:GO [Compatible Instruments] Guitar, Bass [Condition] Unopened, Unused Immediate purchase is welcome. Priority will be given to the person who purchases, even during negotiations. To prevent product substitution, no returns or refunds will be accepted. Please bid only if you understand that this item has been in someone's possession. Please note that I work on weekdays, so shipping will mainly be on weekends. This item is also listed on other sites, so it may be removed suddenly. Thank you.