Features: This is a non-isolation DC regulated power converter module with long service life. High power and stable output, it converts 5-40VDC to 1-36VDC. High quality components ensures high conversion efficiency, up to 97%. Designed with terminal blocks for easy and convenient wiring. There are two heat sinks for better heat dissipation and stable performance. Specification: Type: Non-isolated step-down module (BUCK) Input Voltage: 5-40V Output Voltage: 1-36V adjustable (default output is set to 5V) Output Current: 0.3-10A adjustable (default output constant current is set to 3A) Operating Temperature: -40℃ to 85℃(if temperature is higher than 65℃, please enhance heat dissipation) Frequency: 380KHz Conversion Efficiency: 97% (Efficiency is related to input/output voltage, current and voltage difference) Short Circuit Protection: No Over Temperature Protection: Support (automatic shut off output) Reverse Input Protection: No Installation Method: Four 2.5MM screws Wiring Method: IN is input, OUT is output Weight: 88g / 3.1oz (approx.) Package list: 1 * Module Instructions: The current detection of module is for low-end, please don't connect input negative and output negative directly. This step-down module can not step up voltage.Input voltage must be higher than the output voltage. Voltage/Current/Fully Charged Light/Adjustment Method: Voltage Adjustment:Rotate"CV-ADJ" potentiometer to adjust voltage according to you need;Clockwise to increase voltage, counterclockwise to reduce voltage. Fully Charging Light Adjustment: 1, Rotate "CC-ADJ" potentiometer counterclockwise about 10 circles (adjust output current to the minimum, to prevent damage of power for the next step when short circuit).2, Set multimeter to 20A or 10A current position, short circuit output to adjust current to your required vale which will light up when fully charged.3, At this time, if the LED2 light up, rotate counterclockwise RV3 potentiometer (in the middle) till the LED2 lights off, LED1 lights up.Fully charged light is successfully adjusted. Output Current Adjustment:Use the same method to set multimeter to 20A or 10A current position, use the multimeter to short circuit output, rotate the "CC-ADJ" potentiometer to adjust short circuit current to required current. Application: 1, To DIY a regulated power supply, with the function of constant voltage and constant current, not afraid of short circuit during use, can protect the load. 2, To power your various short circuit electronic equipment. 3, To charge all kinds of batteries, set charging voltage and charging current according to different voltage and capacity of the battery. 4, To charge all kinds of batteries with solar panel as power supply, with the function of constant current, can prevent the battery from overcharging, effectively protect the battery. 5, To drive high power LED, can freely combine in series or in parallel. 6, Used as a vehicle-mounted power supply for your mobile phones or a variety of digital products. 1、This is a non-isolation DC regulated power converter module with long service life. 2、High power and stable output, it converts 5-40VDC to 1-36VDC. 3、High quality components ensures high conversion efficiency, up to 97%. 4、Designed with terminal blocks for easy and convenient wiring. 5、There are two heat sinks for better heat dissipation and stable performance.