after You Purchase Our Products, We Will Provide You with the Most Sincere Service and Let You Enjoy Shopping Light Can Be Rotated About 60 Degree and Light Source Box with Battery Compartment is Detachable Adjustable Head Band Ensures More Comfortable and Tight Head Wearing Light Source Box Can Be Used Separately As Lighting Source after Being Dismantled Widely Used in Mechanical Processing, Electronic Repair, Jewelry Appraisal, Timepieces Repair Andature Engraving, Etc Specifications: Single-Plate Lens Magnifications: 1.0X, 1.5X, 2.0X, 2.5X, 3.5X Bi-Plate Lens Magnifications: 3.0X, 4.0X, 4.5X, 5.0X, 5.5X, 6.0X Magnifications Are Marked in the Middle of Lens Table below Denotes the Distance Proportion between Magnifications and Viewed Objects: Magnifications Distance to Viewed Objects 1.0X 300 350Mm 1.5X 240 260Mm 2.0X 215 235Mm 2.5X 205 225Mm 3.0X 160 180Mm 3.5X 135 145Mm 4.0X 125 135Mm 4.5X 110 130Mm 5.0X 100 120Mm 5.5X 80 95Mm 6.0X 60 85Mm Led: 2 Pieces Lens: 5 Pieces Battery: 3 1.5V Aaa Batteries (Not Included) Head Circumference: Adjustable Lens Material: Pc Headpiece Material: Environmental Protection Acrylic Applications: Timepiece Repair, Jewelry Appraisal,Ature Engraving, Etc. Color: Black WhiteMagnifications Distance to Viewed Objects. Table below Denotes the Distance Proportion between Magnifications and Viewed Objects:. Magnifications Are Marked in the Middle of Lens. Bi-Plate Lens Magnifications: 3.0X, 4.0X, 4.5X, 5.0X, 5.5X, 6.0X. Single-Plate Lens Magnifications: 1.0X, 1.5X, 2.0X, 2.5X, 3.5X.