1. This ZOOM telescope adopts optical technology and is equipped with fully coated lenses to ensure excellent light transmittance and imaging brightness, bringing you a brighter view and clearer and sharper images without black edges. 2. This 10-30x42 handheld telescope is also equipped with a mobile phone holder. With a smartphone adapter, you can project the image from the ZOOM telescope onto your mobile phone. The 42mm wide-angle objective lens and multi-layer broadband coating of the high-magnification ZOOM telescope help improve light transmittance and resolution for brighter images. 3. The 10-30x magnification and wide-field ZOOM telescope provide a more comfortable, wider field of view, clearer details and an unparalleled viewing experience. It is perfect for hiking, camping, bird watching, sports, concerts, travel and viewing. 4. The 10-30x42 ZOOM telescope adopts advanced full multi-layer coating technology and a large BAK4 prism to improve light transmittance and reduce unnecessary light reflections, while providing clear, high-contrast, and color-accurate images. Whether you wear glasses or not, this ZOOM telescope provides an excellent view for your outdoor adventures and will not cause dizziness even for long periods of viewing. Note: 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. Sold by-YJL official store