Check out the youtube link and see how it works https://youtu.be/h6Ky_HbWB-c The latest hand operation yarn winder to ensure that all your yarn balls are the same size. FOR KNITTING MACHINE, FOR WINDING YARNEssential for machine knitters and hand knitter.The diameter of yarn ball can be about 10cm. Meter Length Counter:You can easily count how long is your yarn ball by length now! Very convenient.Max. length: 999mWax stand and tension unit also included on the set.This meter is able to count two-way metering line length, Orderly or Reverse order. Electric Rotation Counter:**As the battery is prohibited by international mail, please prepare a AA battery. (Ordinary AA battery can use one year)**Is an industry first feature.This counter will do the data work for you. It will count when the cone spin one circle, it will help you to measuring the weight, size of the yarn ball to ensure that all your yarn balls are the same size and convert to many useful data.Case cover made by fortune paulownia wood, Light weight and beautiful. -LCD display, large and clear.-Easy to use -Maximum counting speed: 20 times / second, 1200 times / min.-The seismic design effectively prevents data loss.-Reliable, durable.?-Working Temperature: -5 - 40 ℃ Accessories: 1). 3 Yarn Cone Holder Yarn Stand: Place your yarn cone neatly. 2). Spare cone for the yarn winder https://www.eCRATER.com/itm/281624747334 3). Basic Wax stand & tension unit: https://www.eCRATER.com/itm/Wax-Stand-Yarn-Clamp-Standard-Size-Wool-Yarn-Winder-/282056869982 Made in Hong Kong PLEASE VISIT OUR STORE AT http://stores.eCRATER.com/hk-knitbox FOR MORE PRODUCTS Free shipping form Hong Kong to worldwide by Hong Kong Post office with tracking no. • Paypal only No Exception, please settle the payment within 3 days after the product. Postage cost cover not only postage but packing and handling. Postal insurance Optional. • Shipment roughly takes 6 - 14 working days to any part of the world, but if the customs wants to inspect, it would be delayed for some time. • Normally we can sent out item within 1-3 working days after payment is confirmed. We will ship item to you from Hong Kong by registered airmail. • We only ship to the shipping address of buyer's Paypal account. We are not responsible for wrong or undeliverable address. • We are not responsible for any import tax, customs fee, or customs delay. • If you have any question about our products or transaction, please tell me before buying. I will reply to you as soon as possible. • If you have any questions about our products or the transaction, please tell me before buying, I will reply you within 24 hours. • If problems occur, please contact us before you initiate any action. I will do my best to resolve it. • Item can be refunded within 3 days after receiving the item in case of it is defective. (postage is not refundable) Thank you very much