By connecting it between the shaku-uri machine and the battery, you can make the rod move in a tricky way, which strongly appeals to fish like squid and herring when using sabiki fishing. The moving time and the stopped time can each be freely adjusted between 0.5 seconds and 15 seconds, allowing for a variety of movements. Also, since it is an electronic device, be sure to connect the positive and negative terminals correctly. The battery is for 12V only.