Feature: 1. 2 TYPES BOBBIN CONSTRUCTION: Bobbin winder is equipped with two types of bobbin fixing construction, which can be used to wind industrial sewing machine bobbins as well as domestic sewing machine bobbins. 2. INCLUDED ACCESSORIES: Bobbin winder is used for sewing machine bobbin winding, comes with bobbin winder and 6 extra coils, easy to operate. 3. TWO POWER SUPPLY METHODS: Portable electric winding machine is powered by USB or AA batteries(battery not included), built in storage space, case with handle, easy to carry. 4. EASY TO OPERATE: Will make the winding job easy to complete, the bobbin winder consists of a spindle for bobbin fixing, three rods for storing the bobbin, and a threaded tension disk for adjusting the tightness of the winding. 5. DURABLE: Portable electric winding machine is made of plastic and stainless steel, durable and not easy to damage, can be used for a long time. Specification: Item Type: Automatic Bobbin Winder Material: Plastic, Stainless Steel Product Specification: 1 Set Product Use: Household Applicable Scenes: Most Scenes Battery: 2 x AA Batteries (Battery Not Included) Size: Approx. 13.8 x 8.5 x 10.4cm / 5.43 x 3.35 x 4.09in Colors: White. Package List: 1 x Automatic Bobbin Winder (Battery Not Included)1 x English User Manual6 x Thread