Feature: 1. Widely Application: Increase the design of thread holder, small and large bobbins can be used. 2 kinds of bobbins, special bobbins are also available, stable bobbins and low noise when winding. 2. Power Supply: Dual power supply by battery and wire. Only need 3pcs 1.5 AA batteries(battery not included) or a cell phone Type C charging cable can be used directly. 3. Photoelectric Induction: The principle of photoelectric induction is utilized to control the size of the bobbin winding amount, which makes the bobbin winding amount more precise and effective. 4. Thread Clamping Knob: According to different kinds of sewing threads, adjust the looseness or tightness of the thread clamping knob, which can make the bobbin winding more regular and fluent. 5. Unique Design: With two extra bobbin organizer posts, it can store 4 bobbins. The dust cover effectively protects the item from dust and dirt. Felt pads effectively minimize bobbin noise. Specification: Item Type: Automatic Bobbin Winder Product Material: Plastic, Stainless Steel Product Specification: 1 Piece Product Use: Household Applicable Scenes: Most Scenes Battery: 3 x AA Batteries (Shipped Without Batteries) Color: White Product Size: Closed Condition Size: Approx. 10x14x8cm / 3.9x5.5x3.1in . Package List: 1 x Home Electric Winding Machine1 x Spool Thread Stand1 x English Manual Note: All data are measured manually, and there are certain errors in the measurement results.