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