A. All multi-coated optical system, capable of presenting detailed images. B. Lightweight and easy to use, no application required. C. Wide compatibility: F1.8 design, the universal clip is suitable for a large proportion of mobile phones. D. Can be used for various applications such as laboratory work, STEM applications, jewelry appraisal, health diagnosis, art research, outdoor exploration, etc. E. Compatible with single - camera and dual - camera mobile phones. Optical distortion: Less than 4.5% F. Definition of standard focusing distance: 10 - 11.4 mm (a relatively optimal distance is 10.95 mm from the first lens of the lens). G. Definition of focusing distance based on product shape: 3.6 - 5 mm (a relatively optimal distance is 4.57 mm from the outer surface of the product). H. Number of lenses: 4 groups with a total of 4 pieces. I. Magnification: Approximately 100 times. J. Lens: F1.8 K. Lens coating: Multi - coated L. Clamping distance: Approximately 40 mm from the edge of the mobile phone. M. Battery capacity: 30 mAh N. Charging interface: USB O. LED brightness: 6 LED light guides, single brightness P. Battery life: Approximately 100 minutes, flashing when the battery is exhausted. Q. Color temperature of the lamp beads: 6000 - 6500K R. Charging indicator light: The red light is on when charging, and the green light is on when fully charged. S. Charging time: Approximately 90 minutes T. Color: Black U. Material: PC V. Dimensions: 8.6 cm × 8.6 cm × 3.0 cm W. Contents of the package: 1 mobile phone lens 1 USB cable 1 cleaning cloth Only the above package contents are included, no other products are included. X. Note: Light and different displays may cause some differences between the color of the item and the actual object. The measurement error is within ±1 - 3 cm.