Ultrasonic Water for Tank Level Meter Temperature Sensor Low battery Liquid Depth Indicator for Time Alarm Transmitter Measuring Features: This meter monitors for tank liquid depth level, and displays on a 10-element LCD bar graph It can keep min/max records of for tank liquid level Supports for tank liquid level high/low alarm and for tank liquid empty alert Displays indoor temperature ( or ) and for tank temperature ( or ) at the same for time The receiver can be put standing on desk or hanging on wall. Keep an eye on your outdoor water for tank from the comfort of your own living room, up to 100m away. Installed at the top of your water for tank, the transmitter unit measures the water level using an ultrasonic sensor and temperature using a thermo sensor. You can hang the receiver unit on a wall or pull out the stand and place it on your kitchen for bench top, table or desk. View your room's temperature, for tank temperature and water level (represented by a 10 element bar graph). You can store min/max records and set alarms for specific water levels (high/low) or when empty. Specification: Transmission distance: max.100 meters( in open space) (Tips: 1m=3.28ft) Frequency: 433MHz Indoor temperature range: -50-0 Resolution: 1 Accuracy: 1 for Tank temperature measure range: -40- -60 Resolution: 1 Accuracy: 1 Water level measure range: 0-15m (0-49ft) Resolution: 0.01m Accuracy: 0.03m Alarm duration: 120sec Power consumption: Indoor receiver: 2xAA 1.5V batteries for Tank transmitter: 6xAAA 1.5V batteries Monitor size: 10*9*3.5cm/3.94*3.54*1.38inch Transmitter size: 15 *10cm/5.90*3.94inch Weight: 220g Note: 1m=3.28ft Package Includes: 1* Indoor LCD Receiver 1* Water Level Sensor Transmitter 1* Mounting Screws 1* Instruction Manual