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: Spindle orientation: right Specifications: Household Winder Drive type: electric Power supply mode: USB power supply or dry cell power supply Suitable power supply: 5V DC or 2 AA batteries (not included) Product Power: 7.2W Material: Plastic Size Chart: 140x100x88mm/5.51x3.94x3.46inch Package Includes: 1 Piece Electric Bobbin Winder Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!