... , 6CTA ) and marine engine.3.OEM standard. 4.Competitive price.Electrical speed controller ESD6700 1.one year warranty 2.OEM services ... stability:±0.25% or betterSupply: 12 or 24V dc battery systems(transient & reverse voltage protected)speed range/Governor:1k-7.5k ... , ESD5220, ESD5221A2.ESD5500E, ESD5520E, ESD5521, ESD5522E3.ESD5550E, ESD5570E, ESD5330 Cummins Electrical Speed Controller ESD6700