A tracking device for slaves functioned as both an implant chip and a homing beacon placed inside the body of a person who was enslaved to stop them from running away. If they went too far from the tracking transmitter, which was held by the slave owner, it would set off a minor explosion that resulted in the death of the enslaved individual. A deactivator wand could be used to disable the device. Anakin Skywalker and Shmi Skywalker, who were Humans, had these transmitter chips implanted in them, and before being freed, Anakin attempted to find a way to locate his own chip. At approximately 44 ABY, Kitaya Shuul had a device of this type implanted just beneath her shoulder blade.