Shenzhen Qiyue Technology Co., Ltd. is based in China and lists GPS navigation products on Global Trade Plaza. The company offers a 4G GPS tracker designed as a wrist-worn device for prisoner monitoring and personnel tracking applications. The tracker combines GPS, Beidou, WiFi and LBS positioning with GSM/GPRS data transmission. It includes a mechanical anti-dismantling watchband, IP68 waterproof and dustproof rating, two-way voice communication, SOS emergency dialing, electronic fence alerts, and health monitoring functions such as body temperature, heart rate, blood pressure, blood oxygen and step counting. Each unit carries an independent IMEI number for automatic personnel identification and track recording.