From the hand of K&F Concept, it offers us this product that is a long-range binocular, 10x25. It is the type BAK4 de Prisma with FMC, which is oriented for semi and professionals. It comes in a box with some features it can offer on the side. It comes in a handy carrying case with Velcro closure and an instruction manual, as well as a strap and cleaning cloth for the lenses. The first thing you see about the binoculars is that they have a nice, minimalist, well-designed, small in size and quite handy, for one. The material used is resistant and well finished, with no gaps or play. The diameter of the lens is 25 millimeters, its maximum magnification is up to 10 steps, the eye relief is 7 millimeters. These are their dimensions: 13 x 13 x 6 centimeters and a weight of 250 grams, somewhat acceptable, light, handy. Surprisingly, it has a good view range and as sharp as can be. It is especially ideal for hunting, hiking, landscaping, nature in general... I was able to see animals in the clearest way. Magnifications and sight adjustment are good thanks to its BAK-4 cousin. Multi-coated lenses (FMC) guarantee good light transmission and resolution as well as true colors. It is seen up to 1000 meters away within the correct range. It is impervious to IP66 type and protects against dust, moisture. It is not possible. The rubber to support the eyes is good, soft, silicone and helps a lot. The 7mm focal length is correct and does not get in the way of the eyelashes. Highly recommended and at a reasonable price. Good finish and construction qualities.