DFB-2000
this personal defense field generator, manufactured by Palladia Electronics, was worn like a belt. Contained in the belt was a small proximity sensor and energy emitter, designed to protect a being's personal space. Whenever an unwanted intrusion occurred, the sensor picked up incoming pressure and rected by releasing a stun charge at the offender. The stun charge varied in strength, depending on the force with which the intruder approached the user.