1. Portable: The compact cord winder allows you to easily carry it with you, a simple cord winder. 2. Features: Bottom suction cup design, more stable when winding. Comes with lock, hidden handle and dustproof. 3. Two Kinds Of Bobbin Fixing Structures: The Bobbin Of Industrial Household Sewing Machine Can Be Wound. 4. Two Power Supply Modes: USB charging(USB Type-C charging cable not included) or dry battery power supply(Battery not included), built in storage space. 5. High Speed Motor: Use this machine to wind the bobbin quickly and evenly, and automatically stop when the bobbin is full. Item Type: Bobbin Winder. Product Specification: 1 Piece. Product Use: Household. Applicable Scenarios: Most Scenarios Battery: 2 x AA Batteries (Battery Not Included) Power Supply Modes:USB charging(USB Type-C charging cable not included) /dry battery power supply(Battery not included) How to use: 1. Remove the battery cover from the bottom of the machine. 2. Insert 2 x 1.5VAA batteries (not included) as shown in the picture, then reattach the battery cover. Or plug the USB data cable into the Type C socket and supply power through the DC5V power adapter. Note: Use only non rechargeable batteries. 3. Pull up on the locking tab to open the top cover. 4. Raise the spindle to the fully extended position and place the spool on the spindle. 5. Following the numbers and direction arrows, pass the thread between the eyelet and the two clips of the suture tension disc. Pass of the thread through the hole in the bobbin, insert the bobbin into the winding shaft, and turn the bobbin slightly until the spring on the shaft snaps into place. 6. Make sure the bobbin bar is installed between the top and bottom rims of the bobbin. 7. the "ON" button to start. Winding stops automatically when the bobbin is full. If you want to adjust the winding amount of the bobbin by y<br