Operation: Works while you keep holding the switch with your foot and release to turn off. Made of high-quality ABS plastic with a slotted design to prevent slipping and ensure efficient operation. Compatible with Singer air electric sewing machine models: 4600, 4610, 4613, 4617, 4623, 4663, 5910, 6230, 6233, 6234, 6235, 6250, 6251, 6267, 6268, 7000, 7004, 7005, 7028, 7029, 7033, 7034, 7035, 7037, 7043, 7050, 7060, 9000, 9020, 9110, 9113, 9117, 9124, 9130, 9133, 9134, 9137, 9143, 9210, 9217, 9224, 9240, 9323, 9334, 9410, 9416, 9417, 9420, 9430, 9444. Color: As shown. Material: Plastic. Package contents: 1 x Pedal Foot Controller. Only the items listed above are included; other products are not included. Note: Light reflection and different displays may cause slight color differences between the item in the picture and the actual item. Measurement may vary by +/- 1-3 cm.