Specifications: Color: Black/White Equivalent focal length: 40.6mmExit pupil diameter: 1.45mmOptical distortion: <4.5%Focus distance: 0.3mm Number of lenses: 4 pieces in 4groups Magnification: 200xLens aperture: F1.8Product material: ABS, PC +electronic components Clamping distance: Maximum: 12mm, Minimum: 4mm Battery capacity: 110mah Lighting time: 2-4 hours, flashing when the battery is exhausted Charging indication: The red light will light up when charging, and the green light will light up when fully charged Charging time: 1 hour Packing size: 9.58.54cmSingle set weight: 70g Charging interface: USB- Type-C interface