The IOTA IQ4 Smart Charge Controller provides automatic bulk, absorption, float and equalization charging control for IOTA DLS Series battery chargers. The four-stage charging process reduces charge times, ensures a complete and constant charge, and prolongs battery life by preventing stratification and sulfate accumulation that occurs while the battery is not in use. The IQ4 is easily installed by plugging directly into the voltage jack on the DLS charger, automatically activating the IQ charge control circuitry. For use with any 12V or 24V DLS Series battery charger of any amperage. Includes 10" cord. 2.6" x 1.3" x 0.7". 2 year warranty.