【Wireless Communication】Utilizes ZigBee technology for reliable and efficient data transmission, solving signal interference and blockage issues. 【Versatile Temperature Modes】Multiple adjustable temperature modes to suit various scenarios and environments. 【Remote Monitoring】Wireless data signal transmission allows for convenient remote monitoring via smartphone. 【Energy Efficient】Ultra-low power consumption design ensures long battery life for extended use. 【Low Voltage Alert】Features a low voltage detection and notification function to prompt timely battery replacement. 【Regular Reporting】Sends periodic online reports to the main control unit to ensure continuous monitoring. 【Tamper-Resistant】Professional anti-tamper design for enhanced security in the field of protection systems. Specifications: Model: HS03 Communication Method: ZigBee Dimensions: 61.2 x 23mm Operating Temperature: -10~50°C Power Supply: DC 3V (2 x AAA batteries, not included) Function: Detects human presence by sensing moving infrared radiation emitted by the human body within the protected area