I ordered a Viajero Monocular Telescope, 12X50 HD in January 2021 and was pleasantly surprised by the quality of the optical system and the sharpness of the image. I have NIKON 7X50 marine binoculars and ZHUMELL 10X42 binoculars and they are perfect when I travel by car. But when hiking, when I want to take light things with me, my new Viajero is simply unbeatable. For the price I paid, this lightweight clear image monocular delivers crisp images. In addition, the phone holder has a very solid construction compared to other monocular kits. I tried to shake the phone out of the holder but the strong spring mechanism won't let me. Adjusting your phone's camera lenses is also a breeze thanks to the quick-adjust rotating connector. In general - perfect design and quality. A suggestion to the developers of this device: you might consider filling in the empty space in the focus adjustment tube. This will hold the 12X50 label even better.