The Kidde 900-CUAR is a hardwired (120V AC) combination smoke and CO alarm with 2 AA battery backup and self-testing components that continuously verify the alarm is functioning. When one alarm sounds, all interconnected alarms sound together for whole-home activation. The included mounting bracket installs in 4 orientations for flexible placement. This model is replaced by the 30CUAR.
What replaces the 900-CUAR?
Kidde recommends upgrading to the 30CUAR, the current DETECT hardwired combo alarm with AA battery backup and enhanced sensing technology.
Do I need a professional to install the 900-CUAR?
Hardwired alarms require connection to 120V AC wiring. This typically requires a licensed electrician or qualified DIYer comfortable with electrical wiring. Always turn off the circuit breaker before working with electrical wiring.
# Kidde Hardwired Smoke and Carbon Monoxide Alarm with Self-Testing and AA Battery Backup **Model:** `900-CUAR` **Brand:** Kidde **Category:** Combo Alarm Hardwired > The Kidde 900-CUAR is a hardwired (120V AC) combination smoke and CO alarm with 2 AA battery backup and self-testing components that continuously verify the alarm is functioning. When one alarm sounds, all interconnected alarms sound together for whole-home activation. The included mounting bracket installs in 4 orientations for flexible placement. This model is replaced by the 30CUAR. ## Specifications | Attribute | Value | |---|---| | Product Type | Combination Smoke + CO Alarm | | Alarm Type | combo | | Sensor Smoke | photoelectric | | Sensor Co | electrochemical | | Power Source | hardwired-ac | | Voltage | 120V AC | | Battery Backup | Yes | | Battery Type | AA | | Battery Count | 2 | | Battery Replaceable | Yes | | Voice Alerts | No | | Voice Messages | | | Smart Wifi | No | | App Connected | No | | Ring Ecosystem | No | | Interconnect | Yes | | Interconnect Type | hardwired | | Wire Free Rf | No | | Max Interconnect Devices | 24 | | Max Initiating Devices | 18 | | Self Testing | Yes | | Hush Feature | Yes | | Smart Hush | No | | Peak Level Memory | No | | Digital Display | No | | Low Level Co Alert | No | | Explosive Gas Detection | No | | Indoor Air Quality | No | | Strobe | No | | Egress Light | No | | Alarm Db | 85 | | Ul Smoke | UL 217 | | Ul Co | UL 2034 | | Warranty Years | 10 | ## What's Included - alarm unit - wire harness - mounting bracket - mounting hardware - 2 AA batteries Source: https://www.jaspecs.com/kidde/combo-alarm-hardwired/900-cuar-kidde-self-testing-hardwired-combo-alarm/