It tells us about the following important of our android device.
Device name and model;
Screen size and resolution;
Serial number of device;
Total and free storage;
CPU number of cores.
Master CPU Z application tells us about useful information of our battery:
Battery health and percentage of battery;
It tells us about battery technology;
Temperature of battery;
It tells us about the following system information:
Android version and API level;
It tells us about the X, Y, Z axis information.