High Power 5 in 1 Green Laser Pointer Pen 5mw UP TO 2 MILE BEAM!! 5 changeable caps/heads for more laser fun! Each with different patterns, plus straight beam. Each Cap screws on and off. Bright True High power 5 mw (appears much stronger than its rating) is ideal for large lecture halls or astronomy Each cap produces different patterns when you rotate it SAME EXACT ONE SEEN ON GHOST HUNTERS! This high powered laser emits a grid of green dots useful for detecting shadows or general visual disturbances during an investigation. Set it in front of a running camera to catch potential evidence. While you can always use this bright, laser pointer in a usual manner, you can also switch out the screw-on heads and make beautiful geometric patterns.