The pushbutton radio type Wave S is available with 4,6 or 8 double-step pushbuttons while Wave L is available with either 10 or 12 double-step pushbuttons for the movement commands. In addition, and always present is a Start/Klaxon button and a STOP mushroom-head button. WAVE L (with 10 pushbuttons) can be equipped with a 8+8 digit LCD screen for displaying the machine status information (using data feedback option). Both transmitters have space for an optional command which can be a multi-position rotary switch, a single-step button or an analogue potentiometer. They are ideal choices for the control of overhead cranes equipped with additional functions such as auxillary hoist, grabs, magnets, etc, and medium sized tower cranes. The possibility of customization extends the possible uses of this type of transmitter to a large variety of machines equipped with on/off control boxes whether AC or DC powered.