Solar charging technology. Equipped with a built-in solar panel that automatically charges six AAA NiMH batteries when exposed to sunlight, this package eliminates the need for frequent battery changes and enables continuous monitoring of the water tank level even during power outages or in remote locations. Accurate water level monitoring. Provides 0.01 m resolution and ±0.05 m accuracy for depths from 1 to 5 meters, allowing real-time tracking of liquid levels and helping prevent bottlenecks or overflows in your water storage system. Weatherproof outdoor-ready design. The IP65-rated transmitter protects against rain and splashes from all directions, making outdoor installation suitable under varied weather conditions while maintaining long-term functionality and reliable performance. Versatile display and alarms. Customizable features include backlight options, 12/24 hour time formats, temperature display in C or F (-40 to 60 C), and convenient alarm settings when water reaches critical values, supporting efficient water resource management. Use scenarios: - Outdoor rainwater harvesting tanks on farms or in remote cabins where power is unreliable; solar charging keeps readings available and alerts you if levels fall. - Outdoor livestock or aquaculture water tanks that require consistent monitoring in varying weather conditions. - Remote irrigation or storage tanks in agricultural or municipal settings, where real-time level data and alarms help optimize water usage.