An alarm you can’t ignore
The indoor siren is loud enough to hear throughout large homes and is great for heavy sleepers.
Install it virtually anywhere in your home and rest easy knowing you'll be alerted during an emergency.
The indoor siren is loud enough to hear throughout large homes and is great for heavy sleepers.
Install it virtually anywhere in your home and rest easy knowing you'll be alerted during an emergency.
Requires base kit and one month monitoring plan starting at $14.99
Indoor Siren
2 replaceable CR123A batteries
Mounting hardware
User guide
ADT+ app compatible
Get an alert on your smartphone if an alarm is triggered.
Easy installation
Alerts with other detectors
When triggered, automatically prompts ADT paired devices in your home to sound.
ADT + App for Android v.9 or iOS v.16.4
Wi-Fi (2.4 or 5 GHz secured with WPA/WPA 2 password) and internet connection
One month monitoring plan starting at $14.99/mo
ADT Base Kit
Easily set it up yourself.
If you need any help at all, reach out via our 24/7 chat support or visit our support page.
ADT Indoor Siren
Professional installation not available
LED Indicators: Blue, Green, Red. Purple for firmware update
Siren output level: 85 dBA at 10 ft (3 m)
Tamper protected: Cover and wall when mounted with screws
Frequency: 1.9 GHz (DECT ULE)
Encryption: 128-bit AES
Power requirements: 3v CR123A Lithium Battery, Qty 2
One-Go-All-Go: Yes
Operating temperature range: 32 °F to 131 °F (0 °C to 55 °C)
Relative humidity: 5-95 % non-condensing
Dimensions (H x W x L): 4.125” dia. x 0.875” (104.77mm x 22.2mm)
Approval listing: FCC, Conforms to UL std 464
The Indoor Siren syncs with the ADT Base and the ADT+ app to help provide an additional layer of peace of mind.
The Indoor Siren reinforces the alarm sound of your devices whenever any sensor or detector paired to your system is triggered. Conveniently place it around your home to help amplify alarm sounds.
Key features include:
The device is wireless and can be mounted on a wall or ceiling using the included double-sided tape or optional screws. It uses 2 CR123A batteries. Place it away from your ADT Base to extend the audible sound of an alarm event, or near an entry to scare away intruders. Visit our support article for step-by-step instructions.
The ADT Indoor Siren is wireless and uses 2 CR123A batteries. It works in tandem with the Base. The Base includes a backup battery for power outages, but if you have Pro-Protect with ADT 24/7 professional monitoring, communications may still be disrupted if your router and internet communications do not also have battery backup, or if the system’s communication path is impaired.