1.The monocular telescope adopts advanced FMC lens and BAK-4 prism, and eyepiece is composed of three latest fully optical lens, which increases the light transmittance to 99.5%, greatly ensuring excellent light transmittance and image brightness, so that your field of vision is brighter, the image is clearer and sharp 2.If you have any questions, we will get back to you within 24 hours 3.10-30x42 zoom Zoom Good- Power monocular telescope is equipped with a real 16mm eyepiece and a 42mm large objective lens, which can achieve a maximum zoom effect of farther and clearer. It has a top-level wide field of view and can be used with your smartphone to get ultra-clear images and record them, which is very convenient for you to do some observation and monitoring activities when traveling outdoors, such as observing birds, hiking. 4.Our monocular telescope features a smartphone stand and a sturdy tripod that can be adjusted to two different angles and 3 lengths as needed. Professionally designed, easy to install, ensuring clearer, brighter images without jitter 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