BlueSolar PWM Charge Controller (DUO) LCD & USB Charge Control - 12/24VDC - 20AFeatures: Liquid Crystal Display; Two 5 Volt USB outputs; Lighting control function, fully programmable ; Three-stage battery charging (bulk, absorption, float), fully programmable; Load output with low voltage and manual disconnect (programmable); Load output protected against overload and short circuit; Protected against reverse polarity connection of the solar panels and/or battery; Charges two separate batteries; Programmable charge current ratio; External Temperature sensor; Please contact your dealer for any returns, repairs or support issues related to this product. - cis2:mm5mnJlm -Quick Guide (pdf)Brochure (pdf)