This a wireless smoke sensor, support wifi and BT two connection ways, with alarm function, once the smoke concentration exceeds the normal standards, it can emit an alarm sound at 80dB high decibel, and immediately push the alarm information to the mobilephone APP via the network, in a timely manner to remind you, and you can take timely action to respond to the situation. Compatible with Alexa, Google Home for easy voice control, you can achieve voice control and enjoy the convenience of technology. It can be used with other Tuya door locks or monitoring devices, reduce the time to open the door. Features: Smoke Sensing & Temperature and Humidity 2in1 Design: High sensitivity, with stable performance microprocessor, all-round smoke detection alarm, fast response time, long-term operation. Not only can you detect smoke, but also support temperature and humidity measurement. WIFI+BT Two Connection Ways: Supports both Wifi and BT connection methods, faster connection to the network. Connect to the network 2 times faster than using Wifi only. Mobilephone APP Control: Record temperature and humidity changes on the APP and display them on a graph. More intuitive to let you know the latest data changes. 80dB Alarm Sound: When the temperature reaches 60 degrees and the smoke reaches a certain level. It can emit an alarm sound at 80dB high decibel to let people react in time and deal with it quickly. High Temperature Alarm Push: With the alarm function, when the smoke concentration exceeds the normal standards, the alarm will immediately push the alarm information to the mobilephone APP via the network, and take timely measures to respond to the situation. So you can get rid of potential danger and economic loss. Voice Control: Compatible with Alexa, Google Home for easy voice control, you can achieve voice control and enjoy the convenience of technology. Intelligent Linkage: It allows you to create a scene for this device to work with other Tuya devices. Used with other Tuya intelligent door locks or monitoring devices, reduce the time to open the door. Low Battery Alert: When the battery is below 20 percent will automatically push a message to alert, convenient to replace the battery in time. Share Function: You can add family members and share with your family for shared control. Group Function: You can close or open the devices in the group together, more conveniently. Recommended Installation Location: The alarm can be installed on the ceiling or tilted; if installed on a pitched or diamond roof, the tilt angle should not exceed 45 and the distance should be 0.5m. Flat Roof Installation: The most recommended location for the smoke detector is in the center of the ceiling. This is because smoke, heat and combustibles that rise to the ceiling will spread laterally. Please maintain a distance of at least 0.3m from lights or other decorations. Sloped Ceiling Installation: If the ceiling is slanted, please install the smoke sensor at a horizontal distance of 0.9 m (4 ft) from the ceiling mount. Using Scenarios: It can be widely used in homes, lounges, cafes, dance halls and other places that need fire alarm monitoring. (This sensor cannot detect gas/heat.) Specifications: Name: Smoke Detector Material: ABS Wireless network: 802.11 b/g/n Input voltage: 2 * AAA battery (battery not included) Detection ranges: 20 Static current: 10uA Installation mode: ceiling type Alarm current: 120mA Operating temperature: -10C to 50*C Low voltage prompt: 2.4V Working humidity: 95% Alarm sound level: 80dB/1m Item size: 90 * 90 * 40mm / 3.54 * 3.54 * 1.57in Item weight: 103g / 3.63ounce Package size: 92 * 92 * 42mm / 3.62 * 3.62 * 1.65in Package weight: 124g / 4.37ounce Packing List: 1 * Smoke Detector 1 * Bag of Accessories 1 * Manual