Wireless Ultrasonic Water Tank Liquid Level Meter Water Level Time Display Low Battery Indicator + Temperature Sensor _x000D_ This meter allows you to know the state of the outdoor water tank without leaving living room. _x000D_ You can mount it on the top of your water tank, the meter can measure the precise temperature with an ultrasonic sensor. _x000D_ Check your room's temperature, tank temperature and water level. _x000D_ You can store min/max records and set alarms for specific water levels (high/low) or when empty. _x000D_ Transmission range up to 100m (free field) _x000D_ _x000D_ Water level displayed on a 10 elements bar graph _x000D_ With tank empty alert, safe to use. _x000D_ Low battery indicator _x000D_ Time display at 12/24hr system. _x000D_ Tank level display at metre or feet. _x000D_ Two tank level alarm mode: high/low _x000D_ Battery power: _x000D_ Receiver 2 x AA 1.5V (not included), _x000D_ Outdoor transmitter: 6 x AAA 1.5V (not included) _x000D_ Indoor temperature range:0~60degree Celsius _x000D_ Outdoor temperature range :-40~60degree Celsius _x000D_ Temperature accuracy:1degree Celsius _x000D_ Water level measure range: 0 ~15m _x000D_ Resolution: 0.01m _x000D_ Accurate: +/-0.03m _x000D_ Colour:white+black _x000D_ Material:plastic _x000D_ _x000D_ Package Contents: _x000D_ 1 x Water Level Sensor Transmitter _x000D_ 1 x Indoor Receiver _x000D_ 2 x Screws _x000D_ _x000D_ Only the above package content, other products are not included. _x000D_ Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_