This meter enables you to monitor the status of your outdoor water tank from the comfort of your living room. It can be installed on top of your water tank, utilizing an ultrasonic sensor to measure the exact temperature. Keep track of your room temperature, tank temperature, and water level. You can log minimum and maximum records and set alarms for specific water levels (high/low) or when the tank is empty. The transmission range extends up to 100m in open fields. The water level is displayed on a bar graph with 10 elements. It includes an empty tank alert, ensuring safe usage, as well as a low battery indicator. The time can be displayed in either a 12 or 24-hour format, and the tank level can be shown in meters or feet. There are two alarm modes for tank levels: high and low. Battery requirements: Receiver: 2 x AA 1.5V (not included), Outdoor transmitter: 6 x AAA 1.5V (not included). Indoor temperature range: 0~60 degrees Celsius, Outdoor temperature range: -40~60 degrees Celsius, Temperature accuracy: ±1 degree Celsius, Water level measuring range: 0 ~15m, Resolution: 0.01m, Accuracy: ±0.03m. Color: white and black, Material: plastic. Package Contents: 1 x Water Level Sensor Transmitter, 1 x Indoor Receiver, 2 x Screws. Only the items listed above are included; other products are not part of the package. Note: Light reflection and varying displays may cause the color of the item in the picture to differ slightly from reality. Allowable measurement error is ±1-3cm.