Ultrasonic Water Level Sensor with Indoor ReceiverMain Functions:Records minimum and maximum water tank levelsMeasures water level using ultrasonic sensor and water temperature with a thermal sensorDisplays both tank temperature and indoor temperature simultaneouslyReceiver can be wall-mounted or placed on a tableSpecifications:Indoor temperature range: 0C to 60COutdoor temperature range: -40C to 60CTemperature accuracy: 1CWater level measurement range: 0 to 15mResolution: 0.01mAccuracy: 0.03mTransmission frequency: 433 MHzTransmission range: up to 100m in open areasTransmission interval: every 30 seconds (if level changes), otherwise every 3 minutesDisplay Features:Tank level shown on a 10-element LCD bar graphDisplays tank low/high alarm and empty messageShows indoor and tank temperatures simultaneouslySaves min/max records of liquid levelsPower:Receiver: 2 x AA 1.5V LR3 batteries (not included)Transmitter: 6 x AAA 1.5V LR6 batteries (not included)Estimated battery life: 12 monthsDimensions:Receiver: 105 x 93 x 25mm; Weight: 93gTransmitter: 155 x 95 x 65mm; Weight: 125gLCD Size: 66 x 45mmPackage Size: 165 x 110 x 105mmPackage Weight: 288gPackage Includes:1 x Water level sensor transmitter1 x Indoor receiver2 x Screws