Item Condition Opened box - box shown has some wear. In excellent condition. Opened but never been used. Includes user manual. We have inspected this item for basic functionality. Item Location Ships from our warehouse in Las Vegas, Nevada, 89102, USA Fast Shipping We handle all paid orders within 1 business day. Best Offers Accepted Offers are reviewed at the close of business each night. We accept reasonable offers for - Multiple units of the same item - Errors or condition changes within our listing - Combining shipping for 2 or more separate orders Return Policy We offer a 30 day return window from when you receive the item. Items must be in the same condition and in original packaging. Seller Warranty - We Protect Against Defects Our in-house technicians evaluate and refurbish every electronic item we list. We are proud to offer our customers a 30-day warranty against defects. Contact us directly by selecting "I have a question about using my item or I want to send the seller a message." We are eager to hear from our customers. Product Description Kidde Hardwired Smoke Detector with 10-Year Battery Backup, Interconnectable LED Warning Lights, model 20SA10. This smoke detector has enhanced sensing technology that reduces false alarms often caused by cooking and sends fast alerts that help give your family more time to get out safely. Plus, it is interconnected so when one alarm sounds, they all do so you never miss an emergency (see user guide for compatibility with other Kidde models). This alarm offers a modern 5-inch design ideal for all living spaces such as living rooms, hallways, kitchens, bedrooms. Comprehensively tested and designed to the latest UL standard for safety and reliability, the 5-inch smoke alarm is powered by 120V AC wiring with a 10-year built-in lithium battery, so you never have to change a battery for the life of the detector (not a battery performance claim). When smoke is detected, the red LED light will flash in time with the loud 85-decibel alarm to help you seek safety. A test-hush button allows you to test the battery operations as well as silence nuisance alarms, should they occur. In addition, the detector is self-testing and easy to install with the included twist-and-click mounting bracket. Meets requirements of 9th Edition UL 217, FCC, and CSFM. Enhanced sensing technology - reduces false alarms often caused by cooking Fast alerts - upon sensing smoke or fire, an 85-decibel alarm sounds and a red led will illuminate Hardwired with 10-year battery backup - operates on 120v ac wiring (installed in the ceiling) No battery changes for 10 years and saves up to 40 dollars in battery changes over the life of the detector 3 LED lights - LED lights indicate alarm status, green equals to normal operation, amber equals to operating error, red equals to smoke or carbon monoxide detected Self-testing - for added assurance, internal components ensure alarm is always operating as expected (self-testing is not a substitute for a weekly manual push test of the alarm) Test and hush button makes it easy to test the smoke detector and silence false alarms, should they occur End-of-life alarm - alarm sounds as a reminder when it is time to replace the alarm after 10 years of use after its original power-up date