Features: This meter monitors tank liquid depth level, and displays on a 10-elements LCD bar graph<br> It can keep min/max records of tank liquid level<br> Supports tank liquid level high/low alarm and tank liquid empty alert<br> Displays indoor temperature ( or ) and tank temperature ( or ) at the same time<br> The receiver can be put standing on desk or hanging on wall.<br> Specification:<br> Transmission distance: max.100 meters( in open space)<br> Frequency: 433MHz<br> Indoor temperature range: -50-0<br> Resolution: 1<br> Accuracy: 1<br> Tank temperature measure range: -40~-60<br> Resolution: 1<br> Accuracy: 1<br> Water level measure range: 0-15m<br> Resolution: 0.01m<br> Accuracy: 0.03m<br> Alarm duration: 120sec<br> Power consumption:<br> Indoor receiver: 2xAA 1.5V batteries(without)<br> Tank transmitter: 6xAAA 1.5V batteries(without)<br> Material: plastic<br> colour: White+black<br> Package Contents:<br> 1 x transmitter<br> 1 x receiver<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.