Description: This meter monitors tank liquid depth level, and displays on a 10-element LCD bar graph Supports tank liquid level high/low alarm and tank liquid empty alert. Can keep min/max records of tank liquid level Displays indoor temperature and tank temperature at the same time. The receiver can be put standing on desk or hanging on wall Installed at the of your water tank, the transmitter unit measures the water level using an ultrasonic sensor and temperature using a thermo sensor. View your room's temperature, tank temperature and water level, You can store min/max records and set alarms for specific water levels (high/low) or when empty. Specification: Model:TS-FT002 Indoor Temperature Range: 0~60°C Outdoor Temperature Range: -40~60°C Temperature Accuracy: ±1 °C Water Level Measure Rang: 0~15m Resolution: 0.01m Accurate: +/-0.03M Transmission Frequency: 433MHZ Transmission Range: 100 meters(300 feet)in open area Receiver Battery: 2X AA 1.5V LR3 Alkaline batteries (Not included) Transmitter Battery: 6X AAA 1.5V LR6 Alkaline or batteries (Not included) Host: 10.5 x 9.3 x 2.5cm/4.1 x 3.7 x 1.0 inch Transmitter:15.5 x 6.5 x 9.5cm/6.1 x 2.6 x 3.7 inch Suitable Liquid Type: All non-corrosive liquid Package Includes: 1x Host 1x Transmitter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.