Ankle Monitor PT400 Tamper Proof GPS Watch is a kind of GPS positioning watch prisoner tracker that can be enforced and can not be taken off after being taken on. It can be mainly used for GPS tracker bail and parole, leaving prison to visit relatives, mental hospitals, patients with acute infectious diseases and other monitoring objects. The watch band adopts high strength PU plus metal layer, not easy to damage, if the tool is cut, it will immediately alarm. electronic monitoring bracelet.