High efficiency, commercial grade, lightweight, quiet operation. 2 or 3 stage charging (user selectable)120 or 230 VAC, 50/60 Hz (user selectable)For all types of Lead Acid batteriesCharge loaded or unloaded batteriesUse as a power supply or DC UPSUniversal Protection Circuit © short circuit, overload, reverse battery polarityCharge 2 to 3 banks of batteries at once © no isolator necessaryIncludes a temp sensor and unique half power mode