Upon arrival I was skeptical because the box that contains it is really small. But once opened and assembled, it came in common dimensions. Imagine my surprise in assembling it piece by piece! Very easy to assemble, there are only 3 joints plus a screw to screw and tighten at will to adjust the inclination of the “foot” that detects metals. It works with 2 9v batteries even if, in reality, I tried it using only one and it still works. To turn it on, just turn the corresponding knob and it is immediately active. Equipped with elbow pad and Velcro strip, it is very comfortable and light in frequent use. The great peculiarity in my opinion, is that already without changes (on the net some do them but are illegal practices), it detects not only metals but also gold! By then passing it on the ground, we will have the V meter hand that will splash at the maximum in case we find metal under the ground (I remember that by law it is our property if we find an object you can select the volume and, alternatively, if you do not want to disturb, there is a jack input to be used with headphones. What can I say, fantastic object with which my daughter is especially having fun. Little expense, maximum yield.