7 Interchangeable Lenses: Angle adjustable magnifying glass with 7 interchangeable lenses 3X, 4X, 5X, 6X, 7X, 10X, 15X magnification and lens can be combined to 21 different magnifications to meet your needs.2 LED Lights: The head magnifier is powered by a 3-piece AAA battery (not included), which improves visibility both day and night and lasts for a long time. With 2 pairs of interchangeable shades for warm and cold light. Note: Do not use alkaline batteries. Common carbon batteries are fine.Comfortable to wear: scratch-resistant acrylic glass with magnifying glass reduces weight. Lightweight ergonomic frame with soft rubber nose pads. It is available to fit almost all head sizes. The inner non-slip base keeps the magnifier stable on the head and is not easy to fall off.Portable Magnifying Glass: You can put this magnifier with head mount on your head like a glasses. It is more convenient to use than the conventional hand held magnifiers, free your hands and help you see things much clearer. An additional cleaning cloth removes dust and dirt to improve visibilityWIDE APPLICATION: With the head magnifying glass you can view your workpieces or texts in up to 25 times original size with high clarity. Perfect magnifying glass for sewing, crafting, sewing, knitting, embroidery, painting, jewellery and laboratory work. Design with storage box for lenses, easy to clean and convenient to carry.Features:Switch between 7 optical acrylic lenses with a simple click and release system. Simply loosen the clip to release the current lens from the headset and insert a new lens.The angle of the mirror housing and the lighting angle of the light source can be adjusted to provide an evenly lit viewing area.Lightweight ergonomic frame with soft rubber padding for comfortable wearing and secure hold of glasses on your face at all times.This magnifying glass can be most used on mechanical processing, electronic repair, jewelry appraisal, watch repair, repair and carving, crafts and so on.Specification:Magnification: 3, 4, 5, 6, 7, 10.15X (can be combined to 21 times)Focal length: 20-166 mmMaterial: ABS + Acrylic + MetalPower supply: 3 x AAA (not included).Light source: 2 pieces LED (replaceable cold and warm light cover).Product size:Folded: 120 x 160 x 78 mm.Unfolded: 200 x 160 x 78 mm.