12V 24V 36V and 48V. Pulse Frequency. LED light indicates when pulse working. 12V,24V,36V,48V combined,manuall setting.
400Ah Smart Battery Desulfator Maintainer Pulse Repair AGM GEL - 12V-48V
400Ah Automatic Battery Desulfator Maintainer to Revive and Regenerate GEL AGM S