Depends on which kind of indoor positioning system you are asking about, the more powerful ones are UWB indoor positioning system, this kind of indoor positioning system, is a kind of intelligent equipment using carrierless communication technology with a bandwidth of more than 1GHz and utilizing narrow pulses of non-sinusoidal wave at nanoseconds to micro-microseconds level to transmit data. It is capable of achieving high positioning accuracy in conventional environments with excellent stability. The system uses the existing mature industrial TCP/IP communication network as the main transmission platform, the corresponding positioning base station, positioning tamper-proof bracelet and other equipment connected to the system, through the regional real-time positioning management software and the main system with a standard special database for background data exchange to achieve the tracking and positioning of regional targets and security management. It can do real-time tracking and monitoring of the controlled target location automatic display, real-time query the current and a time period of the number of controlled targets, activity trajectory and distribution, as well as the controlled target to escape, destruction of the electronic bracelet, or the electronic bracelet is out of power, the realization of the automatic alarm, to remind the management staff to pay attention to, and respond in a timely manner, this positioning system is generally used in drug treatment centers, reeducation-through-labor camps, and other places. It can be said that with the indoor positioning system, drug rehabilitation centers, reeducation-through-labor camps and other places, you can easily complete the management work, in reducing the pressure at the same time, but also greatly improve the management efficiency, the role of the great is not negligible. This bracelet is the application of UWB positioning technology.