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Some other notes before your purchase:

1. Wi-Fi and Internet Service Required: This device is designed to quickly alert you in the event of a power failure, provided that the Wi-Fi connection and internet service continue for a few seconds post-power loss. It will attempt to send power failure alerts at pre-set intervals multiple times. However, to preserve the internal battery, it will not do so indefinitely. In the event of a whole house power outage where Wi-Fi is lost simultaneously, the device may not be able to send an alert. To ensure you still receive these important alerts, we suggest the use of a Uninterruptible Power Supply (UPS) for your Wi-Fi router. A UPS will maintain power to your router and keep your internet connection live for a period, allowing the device to communicate the power failure alert to you.
2. Alert via Text Message without Subscription: Users can register two mobile phones to receive instant alerts via text messages. We cover the cost of each text message sent to the cell carriers, ensuring reliable and swift delivery. Included with each device are 300 free text messages, typically enough to last over 5 years for most users. These can be renewed upon request at no additional cost after the 5-year period. And users will get reminder when the text message quota drops down to 20. Currently, we support phone numbers from the US and Canada only.
3. 'Device Offline' Alert for Connection Loss: The "device offline" alert notifies you when the device loses its connection with our cloud server. This alert is typically triggered by a loss of WiFi connection or an internet service outage. Please note that the "device offline" alert is not generated in real-time, unlike the "power off" (power failure) alert.

We Hear You - Addressing Your Concerns:

1. "Useless - Power went out over night. No audible alarm was made, no txt message, no email": After investigating the issue, we found that the backup battery of the device had been at 0% before the power outage occurred. Our system had sent a 0% battery report to the user, but unfortunately, the battery was not replaced in time. As a result, when the power outage occurred, the device shut down due to the depleted battery. This explains why no audible alarm, text message, or email notification was generated. As designed, when the battery level drops from a higher level to 20%, a "low battery" alert is sent to prompt timely replacement.
2. "Not reliable, randomly decide if to report or skip": The customer reported that our device takes more than 10 seconds to detect a power outage and that alerts are not being sent consistently. This is not typical behavior and does not align with the device’s design. Normally, the power outage should be detected within 3 seconds, with alerts sent immediately. Based on the description, it seems likely that a different power adapter is being used instead of the one provided with the device. We've encountered similar situations where users' third-party adapters contain capacitors that retain power for several seconds, causing delayed detection or failure to detect.
3. "Never worked at all": Unfortunately, we didn't have the opportunity to assist this user directly and ascertain the precise cause of their issue. However, many users report that setting up the device is straightforward when the user manual is followed closely. From our comprehensive support experience, we’ve identified two common obstacles to Wi-Fi connectivity: inputting incorrect Wi-Fi credentials and trying to connect to a 5GHz network. Our device exclusively supports 2.4GHz networks. Modern routers typically accommodate both 2.4GHz and 5GHz frequencies, so ensuring your router has 2.4GHz enabled can typically resolve connectivity problems.
4. "No App!": Considering these sophisticated features, we've determined that a dedicated mobile app is unnecessary. Mobile apps can drain both the battery and the memory resources on your smartphone. Instead, we've established a comprehensive alert system that keeps you promptly and efficiently informed of essential notifications, negating the need for extra software on your phone. This approach keeps our technology simple, direct, and user-friendly. We understand this design choice might not meet every user's expectations, which is why we're here to listen and help.
5. "No Power Off alerts for me": After investigating this customer's case, we found that the device had been in use for over two years and had successfully detected and reported multiple power outages. However, around two months ago, the device went offline. No action was taken despite a "device offline" alert being sent. Just like a smartphone cannot make calls during a network outage or with a dead battery, the Risinglink device also requires power and Wi-Fi to send out alerts. In this case, the missed "power off" alerts were due to the device being offline, not a defect.