New Lon0167 15pcs BNC Male to Female Couple Jack Coaxial Cable Adapter Connector I don't know what this product is used for. The description is quoted from the site, so it may be incorrect. I am very sorry, but I am waiting for those who understand, or those who can research it themselves, to purchase. ✾The photos are for illustrative purposes. Please check the actual photos for the condition of the product♪ ／ Price negotiation ★ Welcome ★ ＼ ＊Instant purchase welcome・Midnight silent purchase OK◎ ＊First come, first served for only one item ＊Welcome to buy in bulk, please feel free to comment ＊Free shipping! ・Please understand and purchase with home storage and simple packaging (⁎ᵕᴗᵕ⁎) ※If there is a defective product, please consult us before evaluation. We cannot respond after evaluation. #Yukko's product list is here ✨☜ 14-26 2932 ★★★★★ ♣