Radio remote control units are provided by snt controls. These remote control is used for cranes. Model cc-305dj is manufactured for 4 motion crane [up to 5 speed steps or stepless]. This remote control is providedwith a shoulder held transmitter, receiver/decoder for crane mounting, 3 sets of ni-cd rechargeable batteries, battery charger and a manual with output wiring diagram. Following are some technical features of this remote control which include: has two dual joysticks, where any two motions can be clubbed in one joystick. Control of additional motions are with an optional selector switch. Auxiliary functions are engineered to meet customer specifications. The transmitter case is made of industrial gauge aluminium. A different version, model cc-405dj1, has the transmitter case made of glass filled nylon. The unit is powered by ni-cd, rechargeable batteries. Hardware features include: weight of the unit is 1.9 kg, size 260 x 150 x 100 mm.