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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

  • Product dimensions2.0 in × 5.0 in × 5.0 in
  • Product weight1.31 lb (0.59 kg)
  • 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.

How it compares

Measured against everything we stock in Alarm Kits & Motion Sensors, at today’s prices. Recalculated every night.

Price $89.99
Pricier than about 90% of the 180 comparable items (median $30.99).

Specifications

Product
Brand nameKidde
Model name30CUAR-W
Part number30CUAR-W
Size & build
Product dimensions2.0 in × 5.0 in × 5.0 in
Product weight1.31 lb (0.59 kg)

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.

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