In ER triage, isolation and psychiatric ward management, staff constantly need to know which zone a patient is in, how long they have stayed, and whether they have left the permitted area. Manual checking is labor-intensive and never real-time.

Built on 2.4 GHz semi-active RFID, the system delivers room-level location and dwell-time management: 1-5 m adjustable accuracy is sufficient for patient flow, geofence alerts and SOS, at far lower cost than centimeter-grade systems.

P26L wristband: 45x35x12 mm / 26 g skin-friendly silicone, alcohol-wipe safe, LCD showing time and battery, 5 uA standby current, magnetic charging with 4-5 months of battery life, factory-locked unique ID, optional SOS and tamper detection.

PB12 anchor: white ceiling unit (<=160x35 mm) with built-in omni antenna and POE module; one Ethernet cable carries both power and data; identifies 2000+ tags per second.

T2 rugged tablet: 10.1-inch FHD display, Android 12, 5G + IP68, fixed at nurse stations or carried on rounds to view location and alerts.

Platform: standard Ethernet architecture with no extra time-sync equipment; iOS/Android compatible with APP/mini-program access; SDK and full protocol docs for HIS/nursing system integration.

ER patient flow: each patient is bound to a wristband; room-level trajectories and dwell times are logged automatically across triage, resuscitation, exams and observation, with overtime alerts.

Geofencing: instant alerts when patients leave authorized zones in psychiatric, infectious disease or isolation wards; blacklist/whitelist supported.

One-touch SOS: wristband SOS triggers popups on both the platform and T2 tablets; tamper alerts report abnormal removal automatically.

Extensions: optional heart-rate/SpO2 monitoring; the same hardware extends to infant anti-abduction and dementia patient wandering prevention.