Use reminder: 1. If you connect a product such as a motor, the instantaneous current is very large and it is easy to damage. Please set a smaller protective power before connecting the load. Or it is not recommended to use the motor. 2. The input cannot exceed DC36V. For DC voltage only. 3. The output can be directly connected to the battery for charging, but the positive and negative electrodes cannot be connected incorrectly, otherwise the product will be damaged. Product application 1. It is used as a common voltage Buck-Boost power supply with over-voltage / over-current / over power / over temperature / under voltage protection 2. The product has constant current function, which can charge the rechargeable battery within 0.6V~36V; Charging steps: (1) determine the floating charge voltage and charging current of your rechargeable battery; (if the parameter of lithium battery is 3.7V/2200mAh, the floating charge voltage is 4.2V; if it is 12V rechargeable battery, generally set the floating charge voltage to about 14V) (2) under no-load condition, set the output voltage to floating charge voltage; (if 3.7V lithium battery is charged, adjust the output voltage to 4.2V) (3) set the charging current (constant current value) and set the current directly. (4) connect the battery for charging. Note: when charging the battery, the positive and negative poles of the battery should not be connected reversely, which is easy to burn the product! 3. The product has constant current function, which can directly drive LED lamp; To drive the LED lamp: (1) determine the working current and maximum working voltage of the led you need to drive; (2) under no-load condition, set the voltage value and current value to make the output voltage reach the maximum working voltage and current of LED (3) connect led and test the machine. This product can adjust the constant current value (between 0 - working current) to realize the LED's steple dimming and no stroboscopic!! Details of interface and key functions: Short pre the "ON/OFF" button to turn on and off the power output, long pre the " ON/OFF" button for 2 seconds, the screen can rotate, 360 four-way rotation.Turn the encoding potentiometer to turn the page quickly. Pre the code potentiometer key briefly to activate the parameter (voltage / current) to be set; Short pre the key of the coding potentiometer to switch between full selection and bit selection; When all is selected, the blue display will be reversed, and the set voltage / current will be switched through the rotary encoder; After bit selection, the corresponding bit will be displayed in reverse blue, and parameters will be set by rotating encoder; After the setting is completed, long pre the key of the encoding potentiometer for 2 seconds or more, and no key operation will automatically exit the setting; All parameters are saved automatically after exiting. Pre the encoding potentiometer key for a short time, and select "capacity / energy / time" for all. After selecting all, the corresponding one will be displayed in reverse blue. Switch the parameters to be cleared by rotating the encoder. After selecting, pre the encoding potentiometer key for a short time to clear the corresponding parameters. After selecting, pre the encoding potentiometer key for a long time for 2 seconds or more, and the operation without keys will exit automatically. No function of coding potentiometer key Pre the key of coding potentiometer briefly to activate the parameter to be set; The switch of parameter name and bit selection is realized by short preing the key of coded potentiometer; After selecting the parameter name, the parameter name will be displayed in reverse blue, and the parameter to be set will be switched by rotating the encoding potentiometer; After bit selection, the corresponding bit will be displayed in reverse blue, and parameters will be set by rotating encoder; After the setting is completed, long pre the key of the encoding potentiometer for 2 seconds or more, and no key operation will automatically exit the setting; All parameters are saved automatically after exiting. Data group function description: 10 sets of data groups of M0-M9 can be saved. By default, the data group M0 can be saved. Pre and hold the key of coding potentiometer for 2 seconds on any interface to quickly call up the M1/M2 data group, and the serial number of the current data group will be displayed at the interface index; In the power parameter setting interface, select the data group, and rotate the encoding potentiometer to call up the corresponding data group; After the parameters in the data group are modified and exited, the corresponding parameters will be stored in the current data group by default. Note: power output is off by default after data group switching; Set voltage U-SET:0.6-36V; Set current I-SET0-5.1A Input undervoltage protection LVP default: 4.8V, self setting; Output overvoltage protection OVP d