There are four no. of HOBO MX1101 Tem. /RH data loggers and they records and transmits temperature and relative humidity (RH) in indoor environments with its integrated sensors. These Bluetoothlow energy-enabled loggers are designed for wireless communication with a mobile device. Using the HOBOmobile app, you can easily configure the logger, read it out and view data on your phone or tablet or expose the data for further analysis. Loggers cancalculate minimum, maximum, average and standarded deviation statistics and be configured to trip audible or visual alarms at thresholds you specify. These loggers also support burst logging in wich data is logged at a different interval when sensor readings are above or below certine limits. And also it has a built-in LCD screen to display the current temperature, relavent humidity, logging status, battery use, memory consumption, and more.