The electronic anklet requires everyone to wear a small wireless tag, and the information of the tag is stored in the prison monitoring equipment to identify, manage, track and locate the prisoners respectively. The accuracy of positioning can be reflected by the number of detention rooms. All prisoners' automatic identification wristbands actively send out information every 1 second to ensure that each prisoner is in the corresponding monitoring area, providing the maximum modern and efficient means for prisoner supervision. The wireless wristband adopts the unique patented technology with completely independent intellectual property rights, and its service life reaches more than 5 years. When the battery power of a label is too low, the system can give an alarm and prompt for replacement, so it is not necessary to check one by one regularly.