This is a battery-powered electric knotter used for connecting PE lines and shock leaders. It is sold at a discounted price because it does not come with instructions! It comes in a transparent plastic case, so you won't lose the bobbin clips. This is especially recommended for those who find it difficult to tie PE lines and leaders, those who find it time-consuming, and those who tend to have variations in knot strength. It allows for easy, consistent knots in a short amount of time! In the past, nylon was the main fishing line, with few other options, but in recent years, more and more people are using PE lines, which are sensitive, strong, and thin. I feel that PE lines are used in many fishing situations, from lures to bait fishing, such as sea bass, amberjack and other blue-backed fish, rockfish, bass, trout in streams and managed fishing areas, and ajing and mebaring. Recommended for beginners and those who have never used PE lines even if they have been fishing for a long time. For those who have been recommended PE lines by shop staff or people around them and want to try them, but have given up on PE lines because they find it difficult to connect them to leaders! It allows you to easily and quickly create a line system with FG knot strength, and it supports everything from light games to offshore jigging. [Product Specifications] Body size: Length 11cm Width 6cm Thickness 2cm Product weight: 86 g Compatible lines: PE line: 0.6 to 3 Nylon, fluoro line: 1.5 to 12 Compatible leader: 6 to 40lb *Power supply: Uses 2 AAA batteries (sold separately) [Product Contents] Line tying machine body Spool clip Dedicated plastic case How to use it: There are instructional videos on YouTube, so you can find out how to use it even without instructions.