LONG MEASURING DISTANCE: 10cm to 4m(4 to 157 inches) from the sensor, which is suitable for different tanks. POWER ADAPTER: Input: 100-240V AC Output: 5V DC. WIFI: Between Gateway and router(max 50m no obstacle) RF433MHz: Between sensor and Gateway (max 500m no obstacle) SAFETY AND HIGH RELIABILITY: IP65 waterproof. 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 10 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. Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines and so on. EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. AU Plug,it applies to Australia and so on. UK Plug,it applies to Malaysia, the United Kingdom and so on. Voltage:AC100-240V Color:Yellow Material:ABS Package Contents: 1 * Water Tank Level Monitor Sensor Kit 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.