... counter,speed controller,linespeed meter Technical parameter: Power: 85-100% rated voltage AV: 380V, 220V, 110V DC: 12V, 24V Reset numbers: 1-9999(X1 ... : <30Hz Min pulse wideband: 15Ms Height above sea level <2000M Power waste ≤ 3WModel NO.:DH48JProductivity:1000000pcs/year Preset Counter (DH48J)