The 10-30x42 zoom handheld monocular telescope combines advanced optics with rugged outdoor design to deliver bright, color-accurate images with comfort for long viewing sessions. Key features - Optical performance: Fully Multi-Coating technology and a large BAK4 prism maximize light transmission, reduce reflections, and provide clear, high-contrast, color-accurate views. Suitable for wearing glasses or not. - Built for tough conditions: fully rubber-armored housing provides a non-slip grip. Nitrogen-filled construction supports multi-environment use and helps prevent internal fogging. - Versatile zoom and optics: 10-30x42 zoom with a 42mm objective lens, FMC broadband coating, and BAK4 prism for brighter, sharper images with authentic color. - Phone connectivity: includes a cell phone holder with smartphone adapters to project monocular images onto your phone for easy sharing and recording. Usage scenarios - Birding and wildlife observation from a distance, on hikes or in the backyard. - Viewing sports events, concerts, or scenic landscapes while traveling. - Outdoor activities like camping and sightseeing where a compact, powerful optical aid is beneficial. Specifications at a glance - Magnification: 10-30x - Objective diameter: 42 mm - Prism: BAK4 - Coatings: Fully Multi-Coated / FMC broadband - Construction: nitrogen-filled, rubber-armored - Accessories: cell phone holder with smartphone adapters