Features 1Load Protection: DIY a regulated power supply with constant current function not afraid of using the process will short circuit can preserve the load. 2Battery Charging: Charge various batteries set charging voltage and charging current according to different voltage and capacity of batteries. 3Solar Power Supply: Use solar panel power supply to charge various batteries can prevent the battery from overcharging and effectively preserve the battery. 4High Power Drive: This solar voltage regulator board can drive high power LEDs which can be freely combined in series and parallel. 5Car Power Supply: Can be used as a car power supply for cell phones laptops or various digital products convenient and fast to use. Specification Item Type: Solar Controller Circuit BoardMaterial: Glass FiberGross Weight: 33g / 1.2ozModule Type: dual USB output 3A buck modulePower Protection: NoneInput Voltage: DC 6-30VOutput Voltage: 5V (with for iOS identification resistor)Output Current: 2A (MAX)Current Limit Range: NoneOperating Frequency: 150KHzConversion Efficiency: up to about 92% efficiency is related to the differential pressure and use of the environmentOutput Ripple: NoneMinimum Differential Voltage: 1VOperating Temperature: -40 to +85 (actual use please pay attention to the power tube temperature the temperature is too high please strengthen the heat dissipation or derate the use)Potentiometer Adjustment Direction: adaptiveWiring Mode: DC 5.5 2.1 socket terminal blockUse: Solar voltage stabilization controller Package List 1 x Circuit Board1 x DC Line1 x Manual