YoLink Smart Home Starter Kit: Water Sensor 4-PackHub Kit - Sensor Compatible with Alexa and IFTTT, 1/4 Mile Range, Instant Remote App, Text(Limitedand Email Alert.

Product Requirements: The smartphone or tablet able to run iOS 9 or higher; Android 4. 4 or higher. Specifications: YoLink Hub Input: 5V DC Maximum Current: 1A Working Temperature: 20C~50C (4F~104FHumidity: 0~90% noncondensing YoLink Water Leak Sensor Product Model: YS7903UC Voltage: 3V DC (2* AAA batteryWorking Temperature: 0C~50C (32F~122FWorking Humidity: ≤100%RH (noncondensingPackage Content: 1 x YoLink Hub 4 x YoLink Smart Water Leak Sensor.