This is something that is done to you - not something you choose to install. It is a magically activated self-immolation spell. When activated, which can be done over any distance by someone with the proper knowledge and the Sorcery skill, it explodes like a Fire: Fireball with a damage value equal to your Magic +2. You must immediately make a DeathTest against a difficulty of your Magic +10. The device then burns out.
This device is protected by an inherent Magic Mask Spellware.
Commonly used by the ISPD.