It involves a large network of robust and secure tunnels that contain newly developed H2-Zero dispensers, both produced by Zero Invasive Predators, a company supported by the Next Foundation established to remove rats, possums and stoats from large mainland areas.

The dispenser uses a hydrogen producing coin cell battery that allows the gas to expand, inflating an air cell that pushes down on a syringe to gradually extrude 125 ml of lure over a three-month period. The lure contains rat toxin.

The major benefit of this method is that the devices can be left for several months, allowing the removal of many rats for little effort.