This is probably one of the favourite things that I have built because it is quite large. It have five degrees of freedom (functions) which make it as realistic as possible. The functions are as follows, 1 a raising and lowering boom, 2 a rotating top section, 3 a raising and lowering hook, 4 the string can be moved back and forth inside the boom, and 5 the hook is rotatable. The cab interior also features a seat and two joysticks. It when the boom it's fully raised it (the entire crane) is 38cm tall, and when the boom is fully extended it is 31cm long from the middle of the turntable to the end of the hook. It also has a standard lego counter-weight.
P.S all parts except string are genuine lego.