Description: This head-mounted magnifier can be composed of 31 types multiple is easy to operate. 31 kinds of multiples can be composed to meet your different magnification needs. Made of ABS and acrylic optical lenses, it's environmentally friendly and durable. The length is 29.5cm, width is 21.2cm, height is 6cm. It's suitable for reading, checking jewelry, coins, stamps and antiques etc. Item Name: Head-mounted Magnifier Material:Acrylic,ABS Style: Modern Shape: Oval Type: Standard Power Supply: USB Charging (Full Charge Can be Used Continuously for 8-12 Hours) Lighting Source: 3 LED Lights Microscope: 1X, 1.5X, 2X, 2.5X, 3.5X, 8X (Can be Combined into 31 Different Multiples) Lens Focal Length: 35-500mm Size:29.5cmx21.2cmx6cm/11.61inx8.35inx2.36in Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 X USB Charging Cable 1 X User Manual 1 X Lens Cloth 6 X Lens 1 X Head-mounted Magnifying Glass