Hardwired Interconnected Smoke Detector

Updated October 21, 2026

This auction ended on October 25, 2026. See upcoming auctions from Rockey Auctions.

Lot number	105r
Auction	1083 HOME IMPROVEMENT AUCTION ~NORRY~
Date	October 25, 2026 at 9:00 AM EDT
Auction house	Rockey Auctions
Location	NORTHUMBERLAND, Pennsylvania

Brand: Kidde Model: 21031556 Retail Price: $40 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. Alarm Sensor Type: Photoelectric. Alarm/Detector Features: 10-Year Battery, Battery Back-Up, Hush Button, Tamper Resistant. Alert Type: Siren. Commercial/Residential: Home. Connector/Contact Type: 3-Wire. Fixed or portable: Fixed. Included: Battery Back-Up, Mounting Hardware, Owner's Manual. Pack Size: 1. Power Source: Hardwired. Voltage (V): 120 V. Certifications and Listings: UL Listed. Product Depth (in.): 2.32 in. Product Height (in.): 5.88 in. Product Width (in.): 5.88 in. Alarm Sensor Type: Photoelectric. Features: 10-Year Battery. Features: Battery Back-Up. Pack Size: 1. Features: Hush Button. Alert Type: Siren. Power Source: Hardwired. Features: Tamper Resistant. Disclaimer : DISCLAIMER: This listing contains a stock image of the item to be auctioned, in order to illustrate the item’s design and functionality when new. However, this stock image is provided for ILLUSTRATION PURPOSES ONLY and cannot be relied upon by any bidder. Instead, actual photos of the specific item up for auction are provided within the gallery. Any written overview regarding features, operations, or capabilities reflects the item’s original specification when new and does not guarantee current condition or complete performance. The absence of any description by Rockey Auction of the item to be auctioned does not establish an implied representation that it is new or functional. It is a bidder's sole responsibility to inspect all actual product photos, read descriptions carefully, and perform any desired pre-bid inspections or inquiries. Bids placed constitute full acknowledgment and satisfaction with the item's condition along with Rockey Auction’s terms AND CONDITIONS of sale

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