1 * 19000mAh ER34615 Li-SOCL2 Battery Battery Life: LoRaWAN® Version: Around 7 Years Cellular Version: Around 5 Years (15-min Collection Interval+1440 -report Interval, 25°C) Non- invasive Liquid Level Monitoring Support External Antenna or Internal Antenna Versions Built-in 3-axis Accelerometer Sensor to Monitor Device Tilt Status Distance Threshold Alarm / Distance Change Alarm / Blind Zone Alarm / Radar-echo Curve / One-click Diagnostic Applications: Sewage well Mode / Rainwater well Mode / General Mode Store up to 4,000 Historical Records Locally and Support Retransmission Support cumulative number report function for power saving (For Cellular Version) NFC and Bluetooth Enabled Material: PVDF Resolution: 1mm Technology: Millimeter Wave Radar Radar frequency band: 60GHz Target: Liquids or Smooth Surface Solid Detection Angle: 8° Range & Accuracy: 0.3m ~ 12m (Up to ± 2mm) Operating Temperature: -40°C ~ 70°C@LoRaWAN ® Version -35°C ~ 70°C@Cellular Version