1) Residual Induction (Br), unit: Gauss (G), refers to the remaining magnetic flux density after the magnetic field is removed from the saturation state, representing the strength of the magnetic field that the magnet can provide to the external environment.

2) Coercive Force (Hc), unit: Oersteds, refers to the ability of a magnet to resist demagnetization when placed in an opposing external magnetic field. It is the force required to reduce the magnetization of the magnet to zero as the external magnetic field is increased to a certain strength, representing the magnet's resistance to demagnetization.

3) The magnetic energy product, BHmax, measured in Gauss-Oersteds, represents the magnetic field energy generated by a unit volume of material and is a physical quantity indicating the amount of energy a magnet can store.