The Kidde P4010ACS-W combines 120V AC hardwired power with Wire-Free RF interconnect for flexible whole-home coverage. It communicates wirelessly with other P4010 Wire-Free alarms — no hardwired interconnect runs needed. A 10-year sealed lithium battery backup eliminates late-night battery chirps. Voice notifications announce alarm status events. A flashing LED status ring provides at-a-glance alarm state information. A bug screen protects the sensor from insect intrusion.
How does the P4010ACS-W interconnect with other alarms?
The P4010ACS-W uses supervised Wire-Free RF (radio frequency) to communicate with other compatible Kidde P4010-series alarms. This means no interconnect wiring needs to run between rooms or floors. When one alarm detects smoke, all paired alarms in the RF network sound.
Does the P4010ACS-W need a battery replacement?
No. The 10-year sealed lithium battery backup cannot be replaced and is designed to last the life of the alarm. A voice notification will announce when the battery or alarm reaches end of life.
Can I install the P4010ACS-W in an existing home with traditional hardwiring?
Yes. The P4010ACS-W connects to 120V AC wiring for primary power, just like any hardwired alarm. The Wire-Free RF handles interconnect communication wirelessly, so you do not need to run the traditional three-wire interconnect cable between units.
How many alarms can be networked with the P4010ACS-W?
Up to 24 compatible Kidde Wire-Free devices can be networked together, providing whole-home coverage across multiple floors and rooms without interconnect wiring.
What do the voice notifications say?
The P4010ACS-W announces voice alerts for operational events including Replace alarm at end of life and Hush mode activated when the Hush function is triggered. This helps occupants understand alarm status without guessing.
# Kidde Wire-Free Interconnected AC Hardwired Smoke Alarm **Model:** `P4010ACS-W` **Brand:** Kidde **Category:** Smoke Alarm Wire Free > The Kidde P4010ACS-W combines 120V AC hardwired power with Wire-Free RF interconnect for flexible whole-home coverage. It communicates wirelessly with other P4010 Wire-Free alarms — no hardwired interconnect runs needed. A 10-year sealed lithium battery backup eliminates late-night battery chirps. Voice notifications announce alarm status events. A flashing LED status ring provides at-a-glance alarm state information. A bug screen protects the sensor from insect intrusion. ## Specifications | Attribute | Value | |---|---| | Product Type | Smoke Alarm | | Alarm Type | smoke | | Sensor Smoke | photoelectric | | Power Source | hardwired-ac | | Voltage | 120 | | Battery Backup | Yes | | Battery Type | 10-year sealed lithium | | Battery Replaceable | No | | Battery Life Years | 10 | | Voice Alerts | Yes | | Smart Wifi | No | | App Connected | No | | Ring Ecosystem | No | | Interconnect | Yes | | Interconnect Type | wireless-rf | | Wire Free Rf | Yes | | Max Interconnect Devices | 24 | | Self Testing | No | | Hush Feature | Yes | | Smart Hush | No | | Strobe | No | | Egress Light | No | | Alarm Db | 85 | | Ul Smoke | UL 217 | | Warranty Years | 10 | ## What's Included - alarm unit (battery pre-installed) - wiring harness - mounting hardware - quick install guide Source: https://www.jaspecs.com/kidde/smoke-alarm-wire-free/p4010acs-w-kidde-wire-free-hardwired-smoke-alarm/