The K&F Concept 10-30x50 HD monocular telescope arrives securely packaged. Everything smells pretty chemical, the smell seems to have spread from the bag to everything else. The monocular makes a handy, robust impression. The colors are muted, the surface is non-slip and the magnification settings are easy to use. The enlarged image is clear, although it feels slightly tinted. So it can be used as binoculars. The points of criticism refer to the use with the mobile phone. The tripod is valuable and stable, with a little patience you can find a stable combination with cell phone and monocular without the tripod tipping over. The mobile phone holder is made of plastic, when it is pulled out to adapt to the width of the mobile phone it squeaks and ratchets, the light padding doesn't help there either. The main problem is the interaction of holder, monocular and mobile phone. First you have to position the hole in the bracket over one of the camera lenses that are now available several times. Then the monocular is attached. However, since this has a weight of a good 350 grams, it pulls the holder away from the camera lens and the resulting gap means that you can no longer get a clean photo. So for a good result you have to stabilize the monocular with one hand and use the cell phone/the shutter release with the other. This takes time, patience and a steady hand. This is nothing for a quick snapshot. In addition, without a mobile phone camera zoom, you only get a small round section enlarged, you only get a full picture with zoom and then the photo quickly becomes shaky and blurred. For a meaningful use with the smartphone, a more stable mobile phone holder would be necessary, which can counteract the weight of the monocular. In any case, with a Samsung A 70, the results were disappointing.