Features 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. Specifications Item Type: Solar Controller Circuit Board Material: Glass Fiber Gross Weight: 33g / 1.2oz Module Type: dual USB output 3A buck module Power Protection: None Input Voltage: DC 6-30V Output Voltage: 5V (with for iOS identification resistor) Output Current: 2A (MAX) Current Limit Range: None Operating Frequency: 150KHz Conversion Efficiency: up to about 92% efficiency is related to the differential pressure and use of the environment Output Ripple: None Minimum Differential Voltage: 1V Operating 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: adaptive Wiring Mode: DC 5.5 2.1 socket, terminal block Use: Solar voltage stabilization controller Package List 1 x Circuit Board 1 x DC Line 1 x Manual