Great for precision sequences or punctuating specific points in your show. This Pro Use Only version is equipped with a Twist Lock (t-lock) built into the base and no external visco fuse - greatly reducing chance for cross-fire. We have eliminated the cardboard base for a frustration free setup. Use the t-lock port for instantaneous ignition - Compatible with standard e-match or Firewire Initiators. This device will drop in 2.5 inch or larger mortars *Please note that the outer carton and the device is mislabeled as Aqua; the product is performing as expected*