Ni-Mn-Ga alloys are bee based ferromagnetic intermetallic compounds undergoing martensitic transformation. These alloys can show shape memory and superelastic behaviors. Some of these alloys can exhibit dynamic large shape change (up to 6%) due to magnetic driven twin boundary motion as one martensite variant changes to another when switching magnetic field. This study has been carried out with off-stoichiometric single crystal and powder Ni-Mn-Ga alloy with M-s = 354 K near T-C =363 K that exhibits intermartensitic transformation close to ambient temperature (RT). The transformation behaviors were investigated with magnetic susceptibility and differential scanning calorimetry (DSC). The optical and magneto-optical images of microstructures were recorded in-situ. The structure of different phases was studied with X-ray diffraction method. The magnetic properties were studied at different temperatures with the vibrating sample magnetometer.