Independent WiFi power failure detector with no hub required. Detects power off/on within 3 seconds, and sends out alert immediately. No monthly fees or subscription costs. | Sends alert via email and text message for outlet power outage, power back on, low internal backup battery, or WiFi connection lost. Up to 2 phones and 4 email addresses can be registered to each device. | Unlike some other brands, Risinglink power failure detector imposes no restrictions on monthly usage or alert intervals for direct text messages. You'll receive critical alerts promptly. No need to worry about missed or delayed alerts due to such limitations. | Rest assured, if the device silently loses its Wi-Fi connection and fails to reconnect, our remote cloud server will detect the issue and send you a device OFFLINE alert. | Experience an additional layer of security with loud 85dB alarm, which sounds independently of Wi-Fi when the power goes out. You can disable this feature during device setup if preferred. | A vibrant green LED that serves as a visual indicator of the A/C outlet power status. | Included is an internal backup battery that can last over 5 years during average power outages. Under normal conditions, the device draws power from and monitors the A/C outlet. | For the device to send out alerts during a power outage, a Wi-Fi connection and internet service are required.