Clip-on Tuner - Manufacturer: S.YAIRI - Model: SYC-01 - Type: Clip-on - Fast response. - The memory display is fine and the transitions are smooth. - The clip is firm and secure. - ON↔︎OFF with the button on the right. *Operation has been confirmed, but I don't have a guitar on hand, so only the power has been checked. *Wrapping the entire item in bubble wrap will exceed 3cm. Please understand and accept the simplified packaging. *No instruction manual or box. *The original test battery is still inside. Please replace it yourself. *Purchased new 3 years ago, used only for testing. Stored in a drawer since then. Thank you for viewing.