EM300-DI-868M Pulse Meter and Pulse Data Logger The Milesight EM-300-DI-868 is a LoRaWAN sensor that makes traditional water meters wireless and intelligent. With this low-power technology, the EM300-DI can operate for up to 5 years on a 4000 mAh battery. Combined with the Milesight LoRaWAN® Gateway and Milesight IoT Cloud solution, users can manage all sensor data remotely and visually. If the connection fails, the EM300-DI continues to collect and store data. Once the connection is restored, the data collected during that period is retransmitted to the gateway, preventing data loss.