Check the listing for details. Wireless Smoke Detector for Wireless Cellular Alarm System STS3-SMKN. Color: White, Condition: New. Listed at 26.95 USD. ★★★★★★★★★★★★★★★★★★★★★ ✅ CLICK HERE FOR FULL DESCRIPTION ✅ ★★★★★★★★★★★★★★★★★★★★★★ ⭐⭐⭐⭐⭐ | Wireless Smoke Detector | This wireless smoke detector connects to our wireless cellular alarm system. Smoke Detector Photoelectric Smoke Detector Test Button LED Light - Alarm Indicator Compatibility Compatible with our STS-309 and STS-310 alarm system. Package Contents 1x Smoke Detector 1x Mounting Bracket & Hardware 1x 9-Volt Battery Fast Shipping We usually ship orders the same or next business day! We ship by the cheapest carrier, USPS, FedEx, or UPS (If FedEx or UPS have cheaper rates, we will automatically ship using that carrier. You may request we only ship by USPS by adding a note in the order.) Warranty & Returns All components come with a 30-day limited warranty directly from us. We will be happy to exchange any component that does not work or stops working within 30-days of purchase. Optionally, you may add a 1-year or 2-year warranty through Square Trade at the time of purchase. Due to the super low price we are offering on this product, we do not accept returns for any reason. However, if you are unhappy with the product, please contact us and we may be able to offer you an upgrade option (dependent on current inventory.) Contact Us Use the "contact seller" link to send us a message and we generally reply within 1-3 days (Mon-Fri). Copyright @ 2022 All Rights Reserved