Feature:1. Load Protection: DIY a regulated power supply with constant current function, not afraid of using the process will short circuit, can preserve the load.2. Battery Charging: Charge various batteries, set charging voltage and charging current according to different voltage and capacity of batteries.3. Solar Power Supply: Use solar panel power supply to charge various batteries, can prevent the battery from overcharging and effectively preserve the battery.4. High Power Drive: This solar voltage regulator board can drive high power LEDs, which can be freely combined in series and parallel.5. Car 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