GSM Function Optical Smoke Detector

GSM Function Optical Smoke Detector Key features: 1.Smart Technology: Designed to help reduce unwanted or nuisance alarms. 2.Single Button Test : Pushing the button to test the alarm 3.Dust Cover is included to keep the alarm clean during construction. 4.Easy Installation/Maintenance features include two screws for easy access to install smoke alarm on the ceiling. 5.Improved UV Resistance keeps the alarm from discoloring over time. Specification: 1.10 groups auto dial phone