When the mine is deployed with the chemical fuze it is very difficult to detect because the only metal in the mine is the detonator capsule. There is a secondary fuze well on the bottom of the mine that can accept a fuze allowing remote command detonation of the mine.
When deployed with a chemical detonator, the mine is difficult to detect because it only contains a detonator capsule made of metal. A secondary fuze at the bottom of the mine can accept another detonator allowing remote detonation.