This digital ultrasonic water level meter provides a convenient wireless solution for monitoring your home water tank. The system consists of a transmitter unit for the tank and a portable LCD receiver for indoor use. The receiver features a clear 4.3-inch LCD screen that displays the current water level on a 10-segment bar graph and as a precise numerical reading (in meters or feet). It also shows both the indoor temperature and the water temperature inside the tank, with units selectable in °C or °F. Key features include programmable high and low water level alarms with a 120-second audible alert (can be muted), a keypress sound toggle, and a backlight. The transmitter has an IP65 waterproof rating for reliable outdoor use and operates on a wireless range of up to 100 meters in open space. It includes low battery indicators for both units. Specifications: * Water Level Measurement Range: 1 to 5 meters * Water Level Resolution/Accuracy: 0.01m / ±0.05m * Tank Temperature Range: -40°C to 60°C (-40°F to 140°F) * Indoor Temperature Range: 0°C to 50°C (32°F to 122°F) * Temperature Resolution/Accuracy: 0.1°C / ±1°C * Power Supply: Receiver uses 3x AAA batteries or a TYPE-C cable. Transmitter uses 6x AAA batteries (batteries not included). * Material: White ABS housing. Package Includes: 1 Receiver, 1 Transmitter, 1 Power Cord.