CP-HAS-S1-W Smart Wi-Fi Smoke Sensor::Alarm: when the detected smoke concentration exceeds, Red LED will flash quickly and the buzzer will give out quick Di-Di-Di alarm sounds.::Hush: when the smoke alarm is alarming, press the hush button, and the device will enter hush mode for about 10 minutes; if in low battery warning status, press the hush button, the device will enter hush mode for about 12 hours.::Low Battery: When the battery power becomes low, the red LED will flash once and the smoke alarm will issue Di warning sound once every 53 seconds.::Report alarms to a smartphone in real-time.:: Support Wi-Fi Protocol: IEEE 802.11 b/g/n.