... product,novel deisgn 3.metronome and practice drum,2 in 1 4.long service life,has head ... and practice drum 2 in 1 digital electronic drum pad Specification:Tempo range: 30~280bpmBeat: 0,1,2, ... 3,4,5,6,7,8,9Tolerance: Less than 0 ... on the elasticity of real drum 3.Metronome and practice drum 2 in 1,convenient to use and ...