Specifications: TY28 upgarde from TY20 Designed for small products detection or exact locating. Model: TY-28MJ Detector method: Magnetic induction Detector sensitivity; Lo: 20-30mm Hi-30-40mm With an iron setting pin of 0.7mm, length 25mm, detection is possible within following renges; Lo: 20mm to 30mm Hi 30mm to 40mm Detecttor alarm: Sound and libration Detectorwidth: 50*25mm Alarm method: Buzzer, Lamp Power source: 9V battery*1(AA) Dimension: 145mm(L)*55mm(W)*45mm(H) Weight: Appr260g Main business: All kind of metal detector for industrial, such as: Hand hold needle detector, platform needle detector, auto-conveying needle detector, wide detecting area needle detector. For Garment, blazer, coat, jacket, shirt, skirt, short, pants, dress, children wear, Knit wear, bedding, hat, handmade garment, beaded garment, beaded scarf, evening wear, hand knitted garment, Swimwear, foot wear, sock, cloth, fabric, sport shoes, wig, food.