LHT65N achieves 5-year battery life from two ER14505 AA lithium cells at a 20-minute transmission interval, making it economical for large-scale distributed deployments where battery replacement costs matter. Internal SHT31 sensor measures ±0.2°C temperature and ±2% humidity; an optional external waterproof probe extends temperature measurement to -55°C for cold chain monitoring. LoRaWAN Class A minimises receiver on-time between uplinks, consuming only 14 µA average in normal operation. Node-RED and MQTT integration examples on Dragino’s GitHub connect the sensor to Grafana dashboards in minutes. AT command firmware configuration enables adjusting uplink interval, alarm thresholds, and ADR via the network server downlink.