Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10
Free standard shipping on every U.S. order · Free 30-day returns
New here? Take 10% off your first order with code WELCOME10

Orders are prepared in 1–3 business days and arrive 3–7 business days after they ship. Alaska, Hawaii, Puerto Rico and remote addresses can take longer. You get a tracking number by email as soon as your order ships.
You can return an item within 30 days of delivery, no reason needed. We email a prepaid return label; items should be unused and in their original condition. Your refund goes back to your original payment method within 10 business days of us receiving the return.
If you have a question about an item or your order, email othercenter.us@gmail.com with the product name or order number. We answer every message by email and reply within 1 business day (Monday to Friday).
SITERWELL Hardwired Smoke and Carbon Monoxide Detector is a dual-sensor alarm designed to detect smoke and carbon monoxide, with a 10-year sensor life and compliance with UL 217 and UL 2034 standards.
Smoke and carbon monoxide are different household hazards, and this combination alarm brings detection for both into one unit. Its linked-alarm function is designed for homes where an alert from one detector needs to sound across connected units, while battery backup supports continued operation during a power outage.
It detects both smoke and carbon monoxide using dual sensors in a single alarm. When a hazard triggers the alarm, its voice alert identifies which of the two has been detected, so occupants can tell the source of the warning. The audible alarm exceeds 85 decibels.
The detector can connect with up to 12 units through a wired or wireless connection. When one connected alarm is triggered, the others sound as well, extending the alert to people elsewhere in the home. The unit uses hardwired power and has two AA backup batteries installed.
A built-in self-check function monitors whether the detector is working and notifies you if it fails. This function is designed to replace manual testing, while the detector’s sensor life is 10 years.
This SITERWELL alarm suits households looking for smoke and carbon monoxide detection in one hardwired unit, with the option to link up to 12 detectors and backup batteries already installed. It is designed for buyers who want voice identification of the detected hazard and connected alarms that sound together.
Q: Can the SITERWELL smoke and carbon monoxide detector connect to other alarms?
A: Yes. The SITERWELL smoke and carbon monoxide detector can connect by wire or wirelessly with up to 12 detectors; when one is triggered, the connected alarms sound.
Q: Does the SITERWELL smoke and carbon monoxide detector have battery backup?
A: Yes. The SITERWELL smoke and carbon monoxide detector is hardwired and has two installed AA backup batteries for operation during a household power outage.
Free standard shipping on every order to U.S. addresses, with no minimum. Orders are prepared in 1–3 business days and arrive 3–7 business days after they ship. Alaska, Hawaii, Puerto Rico and remote addresses can take longer. You get a tracking number by email as soon as your order ships. See shipping details.
Free returns within 30 days. You can return an item within 30 days of delivery, no reason needed. We email a prepaid return label; items should be unused and in their original condition. Your refund goes back to your original payment method within 10 business days of us receiving the return. See returns & refunds.
Damaged or wrong item? Email a photo to othercenter.us@gmail.com and we will make it right.
Read the buying guide: Smoke and carbon monoxide alarms: types, placement and when to replace them
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