With 8x prisms, this telescope is capable of high clarity imaging without discoloration or distortion, and the lenses have excellent light transmission and spotting capabilities that make them visible in low light. Highly sensitive and clear sound quality, this telescope has an excellent radio function that reduces shielding unnecessary noise and effectively restores sound, making it ideal for bird watching and scenery viewing in the field. It is constructed of ABS material. The length of this monocular is 21cm and width is 18cm. It is suitable for camping, scientific observation and bird watching. Item Name: Monocular Material: ABS Features: High Clarity, Shimmering Visibility, Clear Imaging Instrument Magnification: 8 Times Pupil Distance: 4.3 Pupil Diameter: 21 Resolution: 10 12 Seconds Recording Size Details: L: 21cm/8.27", W: 18cm/7.09"(Approx.) 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 Monocular 1 x Headset 1 x User Manual 1 x Wiping Cloth 1 x Umbrella Disk