If you look at the screenshot there are #s. Here
are the words behind the pictures:

Boomer

1.) This is the Boomer in-game when you only
     have one blade on

2.) This is the Boomer in-game when you have
     two blades on.

3.) This is the Boomer in-game when it is off.

4.) This is a good side veiw of the Boomer
      in-game.

NOTE: If you want to turn on/off the second blade
            just hit the lightsaber style button. This way
            you control the saber intensity and destructive
            power.