I am 50 and have trouble keeping it stable. The combination of large magnification, small weight and tiny dimensions make it hard to hold in a steady position that allows accurate readings.

Very lightweight and compact. Also very fast to use. No battery's to go dead and no waiting for warmup. They have this advertised as a "laser" range finder but it is not. It uses the old tryed and true "line" method, such as is seen in very high quality rifle scopes. I have found it to be very accurate out to 200 yds. You place the base line at the hooves of the animal and read the line that is at the top of the animals body..that gives the range. Slight adjustments must be made for differant animals, deer are shorter than elk. But one trip to the rifle range will make this very easy to do. I have found it to be much quicker to use than a laser type and it is not affected by rain and snow. Also I don't have to remove my gloves to use it. No battery's to worry about, it weighs almost nothing and fits in any pocket. If you want a range finder that really works well and is easy and fast to use this is the ticket. I bought 3 more for xmas gifts for my hunting partners. Can't recommend it high enough.