Product Description NOTE: Fast shipping ,if your address in US or CA or EU, it only take 12-18 days to reach your hand. Other country may take 25-35 days depend on your address, thanks for your understanding- Description: [Intelligent Linkage] When the ambient environment change, you can do intelligent linkage. For example, the air conditioner will be on and turn to specified temperature automatically when the room temperature surpass 28℃. And the humidifier will spray when the humidity is lower than 20 percent RH. [Share devices] You can share your added devices with your family members, so they can also monitor the ambient environment. [Temperature Unit Selection in APP] You can choose ℃ or ℉ as the temperature unit through app. [ Third-party Voice Control] Works with amazon alexa, google assistant. [Low battery alarm] The battery level can be monitored. [Temperature and humidity changes.] Temperature and humidity change curve, historical data. [Wall-mounted, easy to install] Specifications: Material : ABS Size: 70x24x19mm Product Weight: 30g Battery:LR03-1.5V or AAAx2 Wi-Fi frequency: 2.4GHZ IEEE 802.11 b or g or n Temperature Measure Range: -20anddeg C - 60anddeg C Humidity Measure Range: 0 percent RH - 100 percent RH Temperature Measure Accuracy: andplusmn 1anddeg C Humidity Measure Accuracy: andplusmn 5 percent RH Package Included: 1xSensor 1xInstruction 1xBack sticker