About This LONG MEASURING DISTANCE: 10cm to 3.0m(3.94 to 118.11 inches) from the sensor, which is suitable for different tanks. POWER ADAPTER: Input: 100-240V AC Output:9V DC. WIFI SIGNAL:The sensor needs to connect to router to get wifi signal.Wifi range is 30m when no obstacle SAFETY AND HIGH RELIABILITY:IP67 waterproof.CE,Rohs and Reach certification. REMOTE OIL TANK MONITORING: Check your tank level from your smartphone – anytime, anywhere! No need to open the tank from time to time. FULL AND LOW LEVEL ALERTS: You will receive message alerts when it is full or low level. Or set the alarm level by app MULTI TANK MORNITORING:One app can monitor as many as 100 sensors.You can connect multi tanks easily EASY TO INSTALL:There is a nut to install the sensor.Install the sensor on top of the tank. OPERATING TEMPERATURE RANGE-10℃~+70℃: suitable for most weather conditions. 1 YEARS WARRANTY:EPTTECH has provided liquid detection solution for over 20 years.1 years gurranty for longterm service. Overview Color : Black Brand : EPTTECH Power Source : Corded Electric Compatible Devices : Smartphone, Tablet Voltage : 110