Real-time water level monitoring: Track the water level at any time through the APP to that there is no unexpected water shortage Customized upper and lower limits: freely set the highest/lowest water level to effectively prevent overflow or water shortage Remote alarm and notification: When the water level exceeds the set limit, the mobile phone immediately push a reminder, giving you peace of mind even remotely 4m long cable, flexible installation: can be easily installed on tall water tanks without any restrictions IP65 waterproof design: to withstand outdoor rain, dust and splashing water, ensuring long-term stable performance Wi-Fi:Between sensor and router (maximum 50 meters without obstacles) Touch keys: and hold for 5 seconds to connect to Wi-Fi Network mode:Zigbee 3.0 LED:Zigbee status Zigbee configuration:LED light flashes quickly Zigbee connection:LED lights on Zigbee not connected:LED light flashes slowly power supply:AC 110V~240V Sensor power supply: Less than 100mA @ 5V DC Liquid level range:0m~5m Accuracy:± 0.02m Working temperature:-20℃~70℃ Protection level:IP65 (The product printed words depending on the batch, but this does not affect use) Color: As Shown Material: ABS Package Contents: 1 * Water Tank Level Sensor 1 * Gateway 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.