3. [High humidity and low humidity alarm]: once the set humidity value is exceeded, the mobile phone will trigger an alarm 2. [High temperature and low temperature alarm]: once the set temperature value is exceeded, the mobile phone will trigger an alarm 1 piece [ZigBee]: Please note that it must be used with a ZigBee gateway! ! ! 4. [Real-time Monitoring]: Powered by AAA battery 1.5V x 2 (battery not included), low power consumption, depending on the default settings of the system, it can be approx. 1 year. The standard data update frequency is 60 minutes, or temperature ±0.6 (adjustable via app), humidity ±6% (adjustable by app). The update frequency can be selected as needed. The smaller the value, the shorter the actual service life of the battery. 5. [Temperature and Humidity Curve]: Record temperature and humidity changes on the app and graphically display them. Inform yourself more intuitively about current data changes, Weight: 0.05291094288 pounds, Manufacturer: Joasaca