4. [Real-time monitoring]: Battery power supply AAA1.5V*2 (excluding batteries), low power consumption, according to the system default settings, it can be used for about 1 year.Data update frequency 1-120 minutes, you can choose the update frequency as The smaller the value, the shorter the actual battery life 1. [Wifi + Bluetooth dual mode]: Connect to faster. connection speed is 2 times faster than Wifi only 2. [High and low temperature alarm]: Once the set temperature value is exceeded, the phone prompt an alarm 3. [High humidity and low humidity alarm]: Once the set humidity value is exceeded, the phone prompt an alarm 5. [Temperature and humidity curve]: Record temperature and humidity changes on the APP and present them to you with graphics. Let you know the recent data changes more intuitively, Weight: 0.05621787681 pounds, Manufacturer: Ehwisbe