Features 1、The design is beautiful and generous, with a crystal shell, and the buttons have a good touch texture. 2、The button can control the output to be turned off and on, and the power‑on default can be set to ON or OFF. 3、The LCD display can display input and output voltage, output current and output power. 4、High security, with input terminal anti-reverse protection, reverse connection will not burn. 5、High efficiency is over 95%, high current heating is small, output voltage 1.2‑30V can be adjusted freely, constant current value can be adjusted from 0‑12A, suitable for high‑power LED constant current drive, lithium battery charging, etc. Specification Item Type: Power Supply Module Model: ZK-12KX Material: Plastic Output Power: Natural heat dissipation 120W (within 8A), enhanced heat dissipation 160W Current Display: Resolution: 0.01A, Range: 0-12A Conversion Efficiency: About 96% Working Current: About 25mA Soft Start: Yes (it may fail when the module with high power load is started) Input Reverse Connection Protection: Yes Anti-backflow At The Output: None (If the load is self-charged or a magnetic load, please connect an anti-backflow diode in series to the positive output) Short Circuit Protection: Yes LWH: Approx. 82 x 52 x 32mm / 3.2 x 2 x 1.3in Features: Operation Method: 1. Use as an ordinary step-down module with over-current protection capability (2) First, turn the CC current adjustment potentiometer with CCW for more than 20 turns to the end, then use a multimeter to measure the output short-circuit current with a 10A or 20A meter, and the current gear to measure the output short-circuit current (directly connect two test leads to the output terminal), and CW to adjust the CC constant current The potentiometer makes the output current get the overcurrent protection value that the load needs to set. (For example, the current value displayed by the multimeter is 2A, then the maximum current when you use the module can only get 2A, when the current reaches 2A, the red constant current indicator light is on, otherwise the indicator light is off) 2. Use as a battery charger (3) First, turn the CC current adjustment potentiometer by CCW 20 turns to the end, and then use a multimeter to measure the output short-circuit current with a 10A or 20A current file (directly connect the two test leads to the output terminal), and adjust the CC constant current potentiometer to use CW. The output current reaches the predetermined charging current value; (4) Connect the battery and charge it. (Steps 1, 2, And 3 Are: The input terminal is connected to the power supply, and the output terminal is not connected to the battery without load) 3. Used as a high-power LED constant current drive module (3) First, turn the CC current adjustment potentiometer by CCW 20 turns to the end, and then use a multimeter to measure the output short-circuit current with a 10A or 20A current file (directly connect the two test leads to the output terminal), and adjust the CC constant current potentiometer to make The output current reaches the predetermined LED working current; (4) Connect the LED and test the machine. (Steps 1, 2, and 3: The input is connected to the power supply, and the output is no-load without the LED light.) Package List 1 x Power Supply Module 2 x Acrylic Board 1 x Heat Sink 2 x Button Plastic Cap 4 x Hex Standoff Nut 4 x Hex Standoff Screw 8 x Screw