Features: This meter monitors tank liquid depth level, and displays on a 10-elements LCD bar graphIt can keep min/max records of tank liquid levelSupports tank liquid level high/low alarm and tank liquid empty alertDisplays indoor temperature ( or ) and tank temperature ( or ) at the same timeThe receiver can be put standing on desk or hanging on wall.Specification: Transmission distance: max.100 meters( in open space)Frequency: 433MHzIndoor temperature range: -50-0Resolution: 1Accuracy: 1Tank temperature measure range: -40~-60Resolution: 1Accuracy: 1Water level measure range: 0-15mResolution: 0.01mAccuracy: 0.03mAlarm duration: 120secPower consumption: Indoor receiver: 2xAA 1.5V batteries(without)Tank transmitter: 6xAAA 1.5V batteries(without)Material: plasticcolour: White+blackPackage Contents: 1 x transmitter1 x receiverOnly the above package content, other products are not included.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.