Optical Glass Lens Adjustable Focus Monocular with Pirate Retro Style Clear, definition viewing with an optical glass lens and adjustable focus for sharp images at various distances. 25x magnification with a 40 mm objective design; extendable construction enables a longer focal length for greater reach and real magnification when stretched. Pocketfriendly and multifunctional: retracts to fit in a pocket, yet can be stretched to achieve higher magnification, making it versatile for different observation needs. Collectible and spacesaving: beyond its viewing capability, it serves as a retro, displayworthy item that is easy to store and does not take up much space. Large aperture and comfortable viewing: 35 mm / 37' large aperture supports bright, clear images; the large eyepiece allows extended viewing sessions with reduced eye fatigue. Durable, simple operation: designed for easy onehanded use with an adjustable focus mechanism; no complex setup required. Practical use scenarios: Bird watching and wildlife observation during hikes or outdoor trips Travel, sightseeing, and urban exploration where a compact, magnification optic is convenient Collectible display or desk accessory for enthusiasts of retrostyle optics Product attributes at a glance: Magnification: up to 25x Objective: 4 mm Focus: adjustable Size: pocketfriendly when folded, extends for longer focal length Material: optical glass lens Aperture: 35 mm / 37' large aperture Viewing comfort: large eyepiece for extended use