Feature 1Widely 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. 2Power 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. 3Photoelectric 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. 4Thread 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. 5Unique 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.Item Type: Automatic Bobbin WinderProduct Material: Plastic, Stainless SteelProduct Specification: 1 PieceProduct Use: HouseholdApplicable Scenes: Most ScenesBattery: 3 x AA Batteries (Shipped Without Batteries)Color: WhiteProduct Size: Closed Condition Size: Approx. 10x14x8cm / 3.9x5.5x3.1in .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Home Electric Winding Machine1 x Spool Thread Stand1 x English ManualNoteAll data are measured manually, and there are certain errors in the measurement results.