Xcortech X3200 chronometer is for measuring the speed of the BBs. It comes in handy when you have purchased or modified an airsoft gun or rifle and want to know if it complies to the maximum speed allowed in the area you want to play airsoft.
A tripod so you can place the chronograph on a reasonable position so you can test your FPS in a standing position.
How does this chronograph work in the field?
It works great. We didn't tested it in conjunction with professional equipment to compare, but it gives a good indication as often this same equipment is used at Airsoft fields in The Netherlands.