I purchased it because I wanted a one-pole waterproof housing, but the rubber stopper parts were insufficient, and I purchased additional. In order to use it, it is necessary to align parts of FRS-101, 102, 103, 104, 105. Hero Electric's HP has information on how to use it. Http://www.hem.co.jp/info/guide.html Hitachi Auto Parts & Service asked questions and taught. I think it is kindness to have information on this page. Since the function is unconfirmed, ☆ has three.