1. Time function 12H/24H system (default display when powered on: 0:00 24 hours)<br> 2. Transmitter low battery reminder<br> 3. Alarm function (default display when powered on: 0:00)<br> 4. Indoor temperature ℃/℉ (default ℃)<br> 5. Data signal indication<br> Water tank temperature ℃/℉ (Default ℃)<br> Tank water level display unit:meter/foot (Power-on default:meter)<br> Tank level high/low alarm mode<br> Water level depth analog display on 10-element LCD bar graph<br> All alarm on/off option system<br> Tank empty alarm<br> Record minimum and maximum values of indoor and tank temperature/level<br> Receiver indoor temperature range:0℃-50℃/-32℉-122℉<br> Transmitter tank temperature measurement range:-40℃-60℃/-40℉-140℉<br> Water level measurement range:0-15m<br> Temperature resolution:1℃ Accuracy:±1℃<br> Water level resolution:0.01m Accuracy:±0.03m<br> Alarm duration:120 seconds<br> Wireless transmission distance:100 meters in open space<br> Screen size:3.15 inches<br> Power supply:Receiver:2xAA batteries; Transmitter:6xAAA batteries. Remarks:Batteries are not included in shipment<br> Product size:Transmitter:15.5x6.5x9.5cm; Receiver:10.5x9.3x2.5cm<br> Colour:White<br> Material:ABS<br> Package Contents:<br> 1 * Water Level Sensor Transmitter<br> 1 * Indoor Receiver<br> 2 * 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.