4. [Real-time monitoring]: Battery powered AAA1.5V x 2 (battery not included), low power consumption, according to the system default settings, it can be used for about 1 year. The default data update frequency is 60 minutes, or temperature ±0.6 (adjustable by APP), humidity ±6% (adjustable by APP). The update frequency can be as The smaller the value, the shorter the actual battery usage time be. 1. [ZigBee Mode]: Please note that it needs to be used with a ZigBee gateway! ! ! 2. [High temperature and low temperature alarm]: Once the set temperature value is exceeded, the mobile phone prompt an alarm 3. [High humidity and low humidity alarm]: Once the set humidity value is exceeded, the mobile phone prompt an alarm 5. [Temperature and Humidity Curve]: Record temperature and humidity changes on the APP and present them to you graphically. More intuitively letting you know recent data changes, Weight: 0.21164377152 Pounds, Manufacturer: Yoeruers