Features:Automatic Water Addition: The power supply voltage range of the water pump control box is AC110-230V.Monitoring Temperature Changes: Effectively targeting liquids such as red wine that require specific temperature storage.IP65 Waterproof: Effective protection against rainwater splashing from any direction.Solar Charging: The solar panel assists in power supply and has a charging function for the rechargeable battery, using nickel hydrogen rechargeable batteries can reduce replacement to a certain extent the number of times the battery is used. Saving the cost of using the battery, when installing, please install the solar panel on the sunny side, when illuminated, it can provide electricity and charge the rechargeable battery.Ultrasonic Level Gauge: Widely used in monitoring and automatic control of container water level systems, it can be used for monitoring the liquid level storage capacity of containers such as boxes/tanks. It is easy to install and convenient to use!