can be modify to call when power outage lasting for 30 sec or less?

The call is automatically made after 5 minutes or 30 minutes of power outage. The time delay to call cannot be modified to a different (shorter or longer) period. This is to avoid temporary outage that typically comes back within a few minutes, and to avoid unnecessary calls. The local alarm on the unit will sound almost immediately after a power outage, but you have to be near the unit to hear it. I connected my unit to a phone line that has backup power to dial out at the first 5 minutes and every 1 hour afterwards (until cleared). The first 5-minute call can be handled by a UPS connected to a phone modem, but the next call needs a different backup power source, because my UPS only lasts for about 20 minutes. I purchased and installed an A/C inverter (with deep-cycle car battery as power backup) to handle this type of event. Your suggestion to vary the call period is a good one, especially when there may be life-saving equipment connected (respirator, etc). Hope Reliance will consider that in their next upgrade. Regards, Larry

Will this work with home phone connect system from Sprint?

I'm not familiar with that service. That said, if no special phones are required with the sprint service then this should work. One important thing to remember - if your sprint service uses a modem, router or ATA to pass signal you will need to add a battery backup to these devices or the alarm will not be able to call out in the event of a power outage

Can you use a cell for this. I have no land line?

No. You must have a land line. There are other systems out there that use a cell but they charge a monthly fee for that service.

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Reliance Controls Corporation THP201 Automatic Phone Out Alarm with 3 Functions

Product ID: 4605317

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Details

Color
White
Brand
Reliance
Power Source
Battery
Compatible Devices
Smartphone
Number of Batteries
1 9V batteries

⏳10 hours continuous alert

📞Calls up to 3 numbers

🌡️Monitors temp, power & flood

Description

📞 Stay connected, stay secure—your home’s silent guardian!

MULTI NUMBER AUTO DIAL - Instantly calls up to three phone numbers anywhere in North America to ensure you never miss an alert.
BATTERY BACKUP INCLUDED - Comes with a 9V battery to maintain monitoring during power failures, so your home stays protected 24/7.
PLUG PLAY CONVENIENCE - Easy installation with keypad base unit that plugs into phone line and electrical outlet—no tech hassle.
TRIPLE THREAT ALERT SYSTEM - Simultaneously monitors power outages, freezing temps, and flooding for total home protection.
LONG LASTING ALARM PERSISTENCE - Keeps calling for up to 10 hours, guaranteeing you’re notified even during prolonged emergencies.

The Reliance Controls THP201 is an automatic phone-out alarm system designed to monitor your home for power outages, freezing temperatures, and flooding. It plugs into your phone line and electrical outlet, calls up to three phone numbers with a clear voice alert, and continues calling for up to 10 hours if needed. Battery backup ensures uninterrupted protection, making it an essential smart safety device for proactive homeowners.

Specifications

Manufacturer	Reliance Controls
Part Number	THP201
Item Weight	1.8 pounds
Product Dimensions	1.5 x 6.25 x 3 inches
Item model number	THP201
Batteries	1 9V batteries required.
Is Discontinued By Manufacturer	No
Color	White
Power Source	battery-powered
Voltage	9 Volts
Item Package Quantity	1
Included Components	Battery, Keypad, Sensors
Batteries Included?	No
Batteries Required?	Yes
Battery Cell Type	Alkaline
Warranty Description	1 Year

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