Liquid Depth Sensor: This water level gauge monitors tank liquid depth to display on a 10-element LCD display bar graph; supports tank level high/low alarms and tank empty alarms. Application: Liquid level sensor can be installed on top of tank to monitor liquid level; you can store min/max records and set alarms for specific water level (high/low) or empty water level. EASY TO USE: The receiver can be mounted on a table top or hung on a wall; keep an eye out for your outdoor tank from indoors or a gazebo; transmission range up to 100m away (in open spaces). Versatile: This level gauge can display both room and tank temperature (Fahrenheit or Celsius). No Risk: We know how important product quality is to you, so if you have any dissatisfaction with the wisdom of your purchase, please contact us for a replacement or refund. We only sell level gauges, not other items in the picture. Due to differences in different monitors, the pictures may not reflect the actual color of the item. Due to manual measurement, please allow slight size errors.