Product Name: ME201W Tuya APP Ultrasonic Wireless Water Fuel Diesel Oil Liquid Level Sensor Type: Tank Water Level Monitor Technology: Ultrasonic Detection Communication: Wi-Fi via Tuya APP Installation Hole Diameter: 55mm Power Supply: DC Power Application: Water, Fuel, Diesel, Oil tanks Dimensions: Custom fit based on installation Features: Remote Monitoring: Access real-time tank levels using the Tuya APP for convenient and accurate management of water, fuel, diesel, and oil levels. Reliable Ultrasonic Detection: Benefit from exceptional distance detection capabilities that provide precise and consistent liquid level measurements, enhancing your monitoring system's reliability. Easy Installation: Install effortlessly by drilling a 55mm hole and securing the sensor with no need for professional assistance. Versatile Application: Ideal for monitoring various liquids such as water, fuel, diesel, and oil, making it suitable for a wide range of projects. Low Maintenance: Designed for minimal upkeep with high durability for long-term use and cost-effective operation, adding substantial value to your projects. Package Included: 1 x ME201W Tuya APP Ultrasonic Liquid Level Sensor 1 x 3M Installation Mark 1 x Self-tapping Screw