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