Build-in industrial -controller.Big LCD display,all adjustable parameter.Fully 4-stage PWM charge management.Build-in short-circuit protection,open-circuit protection,reverse protection,over-load protection.Dual mosfet Reverse current protection ,low heat production.Specification:Batt Voltage: 12V/24V autoCharge Current: 20ADischarge Current: 20AMax Solar Input: Less than 50VUSB Output: 5V/3AWorking Temperature: -35 Celsius to +60 CelsiusApplication: Home, Industrial, CommercialSelf consume: Less than equal 10mAFloat Charge: 13V(default,adjustable)Discharge stop: 10.7V(default,adjustable)Discharge reconnect: 12.6V(default,adjustable)Weight: 150gSize: 133*70*35mmcolor: blackMaterial: ABSPackage Contents:1 x Solar Charge Controller1 x User ManualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.