Explosive Collar

This locked, plastic-alloy collar attaches around a prisoner's neck. It contains an inertial compass, secure radio, and a tiny computer – none of them usable by the wearer – along with explosives equivalent to a 15mm HE warhead. The radio and computer constantly broadcast the prisoner's exact coordinates. A coded signal can detonate the explosive liner, decapitating the wearer. The collar can also be broken (it has DR 10 and 2 HP), but any attempt to damage it that fails to immediately remove it results in detonation next to the subject's neck. Disarming the explosives requires appropriate tools and a Traps-4 roll; failure means the collar explodes. $200, 0.25 lbs., B/100 hr. LC2.