"Strange that it hasn't attacked us yet when it immediately struck the helicopter on approach even if we did just de-cloak. Whatever it is, sensors can't get a read on it and the missiles don't scratch it so that rules out most tech from Apokolips and most of the other cataloged extra-terrestrials..." Batman's monologue was partly for Robin's education and more importantly to provide information to Superman if he happened to be listening. He privately wondered if the robot had purposefully attacked the media chopper to get someone's attention, probably Superman's, but it was still too early to tell. 

Bruce would have scowled down at Oliver if he had bothered to notice him, but keeping the jet moving and prepping the next trick was taking up most of his time. As he flicked another switch a compartment opened on the bottom of the bat-shaped aircraft and a strange weapon lowered from it, looking part satellite dish and part raygun in appearance. As it charged up it emitted a high pitched whine that increased in intensity more and more until finally it shrieked out a blast that ripped through the air around it in a visible, highly concentrated beam focused on the robot's arm cannon.