Check the listing for details. 2 PACK Kidde Hardwired Smoke Detector w/ Battery Backup Model# 20SAR Please Read. Color: White, Condition: Open box, Made in China. Listed at 29.00 USD. Please read. The box is a little beat up. The screws and wiring connectors apparently fell out. New otherwise. These would be perfect for replacements and re-use your Kidde connector. Price has been adjusted. The Kidde Hardwired Smoke Detector with Battery Backup Model# 20SAR is a reliable and essential home security device. With a power source of both battery and hardwired connection, this smoke alarm ensures uninterrupted protection even during power outages. The included batteries guarantee long-lasting functionality, and the sleek white design fits seamlessly into any home decor. Backed by a manufacturer warranty of 10 years, this smoke detector from Kidde is a trusted choice for safeguarding your home and loved ones from potential fires.