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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.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:3. The product has constant current function, which can directly drive LED lamp;Details of interface and key functions:Short press the ON/OFF button to turn on and off the power output, long press the ON/OFF button for 2 seconds, the screen can rotate, 360 degree four-way rotation.Turn the encoding potentiometer to turn the page quickly.Press the code potentiometer key briefly to activate the parameter (voltage / current) to be set;Short press 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 press 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.Colour:blackMaterial:plasticPackage Contents:1 x Buck ConverterOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.