Standalone version – without hub. Hub required, sold separate or together with Kit version.
Safe and Reliable: Comply with CE EN14604 (Certified by Intertek), alarm at maximum 85dB. Alarm Linkage: When one alarm detects smoke, all alarms will chirp to remind you. (Purchase multiple smoke alarms.) Alert: Your Meross app or Apple Home app will receive an alert instantly when danger happens. Battery Replaceable: 2 x 1.5V AA batteries included and replaceable. Automation: Set triggers to control other Meross devices in Meross app. Smoke and Overheat Detection: In additional to smoke detection, it can also detect overheat. When the temperature is too high (54 - 70?), it will chirp to remind you. Works with Apple HomeKit and compatible with SmartThings.