We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
White round hardwired smoke and CO alarm with battery backup

Kidde 30CUAR-W Smart Sensor Smoke CO Alarm

SKU CH-6K0K-5YAYB MPN 30CUAR-W

Hardwired smoke and CO alarm with Wi-Fi connectivity, voice alerts, phone hush, and AA battery backup

  • Dimensions2.0 in x 5.0 in x 5.0 in
  • Weight1.31 lb
  • Dual smoke and CO detection protects against two hazards
  • Enhanced sensing reduces false alarms from cooking by 25 percent
  • One smart unit links all hardwired alarms for whole-home mobile alerts
  • Voice alerts and phone hush let you silence nuisance alarms without a ladder
  • Certified to UL 217, UL 2034 and FCC standards for verified safety

Dual Smoke and CO Detection

The Kidde 30CUAR-W is a hardwired alarm that detects both smoke and carbon monoxide in a single unit. It connects to 2.4 GHz Wi-Fi and sends real-time mobile alerts through the Kidde app on iOS 14+ or Android 9+. Voice announcements identify the specific hazard so occupants know whether to evacuate for fire or ventilate for CO. AA batteries provide backup power only; 120V AC is required for full operation and connectivity.

Enhanced Sensing Reduces Nuisance Alarms

Advanced sensing technology reacts over 25% faster and is up to 3x more precise than standard detection, cutting false triggers often caused by cooking. The alarm meets UL 217 and UL 2034 safety standards plus FCC requirements. Early low-battery warnings arrive on your phone before a chirp starts. Interconnected operation means when one compatible alarm sounds, all linked units sound throughout the home.

App Control Replaces Ladder Trips

The Kidde app lets you hush false alarms from your phone without climbing a ladder. One smart alarm extends mobile notifications to every hardwired unit on the circuit, covering multiple locations such as a second home. Everything needed for installation is included in the box. The device measures 2.0 in x 5.0 in x 5.0 in and weighs 1.31 lb.

Highlights

  • Dual smoke and CO detection protects against two hazards
  • Enhanced sensing reduces false alarms from cooking by 25 percent
  • One smart unit links all hardwired alarms for whole-home mobile alerts
  • Voice alerts and phone hush let you silence nuisance alarms without a ladder
  • Certified to UL 217, UL 2034 and FCC standards for verified safety

Specifications

BrandKidde
Model30CUAR-W
Part Number30CUAR-W
Dimensions2.0 in x 5.0 in x 5.0 in
Weight1.31 lb

Questions about this item

How do I install the 30CUAR-W and what step do people often miss?

Wire it to a 120 V AC circuit and connect to 2.4 GHz Wi-Fi via the Kidde app on iOS 14+ or Android 9+; the AA batteries are backup only and cannot power the alarm or Wi-Fi.

What maintenance or replacement will the 30CUAR-W need later?

Replace the AA backup batteries when the app sends a low-battery notification; the smoke and CO sensors are sealed for the unit's ten-year life.

What limit appears first under sustained use of the 30CUAR-W?

The AA backup batteries will deplete first during extended AC power outages, disabling Wi-Fi and smart alerts until mains power returns.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.