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We study the hidden conformal symmetry of four-dimensional extremalKaluza-Klein black hole. The scalar Laplacian corresponding to the radialequation in the near-region is rewritten in terms of the $SL(2,\mathbb R)$quadratic Casimir. Using the first law of black hole thermodynamics, thissymmetry enables us to obtain the conjugate charges for the CFT side. Thereal-time correlators are also found to agree with the CFT expectations.

Hidden conformal symmetry of extremal Kaluza-Klein black hole in four dimensions