The NI-STARTER is the original glow plug igniter designed for easy, reliable starting of glo fuel model engines. It locks onto the glow plug. Just push down, rotate, and it's locked onto the glow plug for hands free operation. It has a high capacity ni-cad power source and usually provides over fifty starts off one full charge, based on 15 to 20 second normal starts. All versions of the NI-STARTER carry a 180 day warranty against defects in workmanship or the materials used.