This Kidde 10-Year Worry Free Battery Wireless Smoke Alarm features voice alert and wireless interconnectivity. Powered by a 10-year battery that lasts the life of the alarm， no battery installation or replacement is necessary. An \"end of life\" warning will alert you when it is time to replace the entire unit. The voice alarm announces \"Fire!\" if a hazard is detected and indicates when the Smart Hush feature has been activated. This alarm features wire-free interconnectivity with other Kidde 10-Year Wire-Free Interconnect alarms. If one unit is triggered， all interconnected alarms will sound. Wire-free interconnectivity allows for easy interconnect setup and eliminates the need for expensive rewiring. You can even install this smoke detector in a detached garage or workshop and be alerted by another detector in the house. This alarm is also compatible with the Kidde Smart Bridge app and hub (not included)， which will send a message to your smart phone， tablet or PC alerting you to a potential threat.Shop all <a href=\"https://www.homedepot.com/b/Electrical-Fire-Safety-Smoke-Detectors/Kidde/N-5yc1vZbmh8Zua\" target=\"_blank\" style=\"color:#F96302;\">Kidde Smoke Detectors</a> here.

This alarm meets 10 year legislation laws; check local building and safety ordinances for compliance

Powered by a 10 Year non-replaceable， sealed lithium battery system; no battery installation or replacement is necessary for the life of the alarm

Alarm interconnects with other Kidde 10-year Wire-Free Interconnect units via radio frequency， providing an interconnected system without the inconvenience of rewiring your home

Wire-free interconnectivity with the following Kidde models: P4010ACSCO-W， P4010ACS-W， P4010DCSCO-W， P4010DCS-W， P4010DCS-W， P4010LACS-W， P4010LDCS-W

Voice alarm announces "Fire!"， when smoke or a fire hazard is detected

End of Life warning reminds you to replace your unit after 10 years to ensure the most reliable protection

Photoelectric sensor alarms may detect visible fire particles (associated with slow smoldering fires) sooner than ionization alarms

A maximum of 24 Kidde devices can be interconnected in a multiple station arrangement; the interconnect system must not exceed the NFPA (National Fire Protection Association) limit of 18 initiation

devices， of which 12 can be smoke alarms; with 18 initiating devices (smoke， heat， CO， etc.) interconnected， it is still possible to interconnect 6 strobe lights and/or relay modules

Interconnect is not required; this alarm also functions as a stand-alone smoke detector

10-year limited warranty

*Check with your state and local fire and Building/Safety codes for specific information regarding smoke & Carbon Monoxide Alarms.

Kidde offers a full range of 120-Volt AC wire-in life safety products with interconnect capability to provide the most immediate and complete system available; when any one interconnected alarm is triggered， all interconnected alarms within the home sound an immediate warning

Smoke detectors utilize a photoelectric sensor to detect fire hazards and sound an 85 db alarm when a hazard is detected