Thank you for viewing. This is a set of three 15cm patch cables from CANARE. Operation has not been confirmed. I purchased these new and may have used them a little, but I don't remember the frequency of use. Even if I did use them, it was for a short time, and I used them indoors at home. Thank you. KW sound CANARE plugs, set of 3, 15cm each. - Brand: KW sound - Model Name: CANARE - Length: 15cm - Quantity: Set of 3 - Type: Plug Thank you for viewing.