-in industrial -controller.Big LCD display,all adjustable parameter.Fully 4-stage PWM charge management.-in short-circuit protection,open-circuit protection,reverse protection,over-load protection.Dual mosfet Reverse current protection ,low heat production.Material: ABScolour: black + greenRated working voltage: 12V / 24VRated working current: 30AUSB output voltage: 5VDC output voltage: 12VSolar panel voltage: Less than 50VFloat charge voltage: 13.7V / 27.4VUndervoltage protection: 10.5V / 21VUndervoltage : 12.2V / 24.4VFeatures: No-load loss Less than 10mACircuit step-down: Less than 170mVTemperature compensation: -4mV / Cell / Celsius ;Working environment: working temperature -20 Celsius ~ +60 Celsius Storage temperature: -30 Celsius ~ +70 Celsius Temperature requirement: Less than 90%No condensation: Installation hole wire number: Less than 7 # AWG (16mm2) / 3 # AWG (25mm2)Package Contents: 1 x Solar Charge ControllerOnly 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.