Microwave Emitter

The Microwave Emitter was an experimental weapon developed by Wayne Enterprises. Using a focused microwave beam, the weapon was designed for usage in desert warfare by vaporizing the enemy's water supply.

Having infiltrated Wayne Enterprises, the League of Shadows had a prototype constructed for their plan to destroy Gotham City through an airborne fear toxin. The prototype was being transported on a freighter, where two henchmen activated it and killed the rest of the crew. It was then brought on-board another ship, which was investigated by Carl Finch and then killed when he discovered it.

When the time came for the League to destroy Gotham, the emitter was mounted onto the Gotham Monorail System. As the train headed towards Wayne Tower (where the main water hub was located), the emitter vaporized water in the mains and thus releasing the fear toxin. By going into Wayne Tower, the emitter would have vaporized all of the city's water and thus the entire city would have been covered in fear toxin. Batman, with a little help from Jim Gordon, was able to stop the train from reaching Wayne Tower. As the train fell into a parking garage, the heavily-damaged emitter exploded, killing Ra's al Ghul.