Bed Cloting Needle Detector Model: NC-B Belt Clothing Needle DetectorModel: NC-BMulti-Function Interface Panel + 2pcs infrared sensors ... magnetic metal impurities in sewing products, such as: garments,fabric, knit underwear, shoes, hats, toys, crafts, down products, bedding products, carpets ... machine, please cover whole machine to keep off dust. Bed Clothing Needle Detector