Description: - This electric automatic winder saves a lot of time when you need to quickly complete a large project winding project. - A simple, easy way to transfer thread from a spool to a bobbin. This bobbin winder comes in a compact size and completes any collection of sewing tools. - Requires 2pcs AA batteries(not included), and automatically shuts off when the bobbin is full. - The sewing machine's auxiliary device is easy to install and maintain, and there is no problem in daily use. - Suitable for domestic and industrial sewing machines, convenient for your sewing work!Specification: - Material: Plastic - Size: 13.85x10.12x7.6cm/5.5x4x3inchPackage Includes:1 Piece Electric Bobbin Winder