Handheld Digital Tesla Meter, Magnetic Flux Density B Value Tester Permanent Magnet Gauss Meter with Probe

Note, 2400mt = 24,000 gauss, not 2400g. huge difference! which one is correct?

is the probe transverse or axial?

Can this be used on rocks? There are more expensive ones marketed to geologists but they are over 10 times the price.

I would like to read and record the refrigerator in my kitchen cycling on and off all night. Could I record this energy level? time and date?