Thank you for viewing. Shipping costs will be covered by us. Operation has been confirmed. Instruction manual is also included. Four alkaline batteries, including spares, are also included. The BH-717 (or YH-717P) is an electric line twister (line knotter) designed to easily and quickly connect (tie) PE line and leader (shock leader) used in fishing. Manufactured and sold by Panasonic (now Hapyson), it features a speed adjustment function for uniform winding, resulting in stable strength, and is compact and convenient to carry. Main Features: Easy and Speedy Knotting: Allows for quick and accurate knotting of PE line and leader at the fishing site. Speed Control Function: Adjustable winding speed allows for uniform winding, resulting in stable strength. Compact Design: Pocket-sized, making it easy to carry and use at the fishing site. Brand: Originally manufactured by Panasonic, the fishing tackle business has been taken over by Hapyson. How to Use (Overview): Set the PE line and leader in the line holding section of the main unit. Turn on the switch and wind the PE line around the leader (using a half hitch knot). After winding, pull the line tightly to tighten the knot, and cut off the excess line to complete. This is a convenient item for fishing enthusiasts, especially those who frequently tie leaders and lines, such as in boat fishing. We appreciate your understanding and consideration.