IOTA DLS-54-13/IQ4 54 VOLT 13 AMP 4 STAGE SMART BATTERY CHARGER REVERSE POLARITY PROTECTION:IN THE EVENT OF INCORRECT INSTALLATION THIS UNIT UTILIZES STANDARD AUTOMOTIVE BLADE TYPE FUSES FOR EASY REPLACEMENT EXCEPTIONALLY CLEAN DC OUTPUT LOW AND TRANSIENT AC LINE VOLTAGE PROTECTION MINIMIZED RADIO AND TELEVISION EQUIPMENT INTERFERENCE TIGHT LINE/LOAD REGULATION