Features: When you use the product the module inputs and outputs to be isolated from ground. Use as a step-down modules with overcurrent protection capabilities Usage: (1) adjust the voltage potentiometer so that the output voltage reaches the value you want. (2) use a multimeter to measure the output short-circuit current with 10A stalls while regulating the current potentiometer so that the output current reaches a predetermined LED operating current. (3) Connect LED work. (12 steps as: Output is unloaded do not connect LED) Specifications: High efficiency up to 96% Built in thermal shutdown function Built in current limit function Built in output short protection function Input reverse polarity protection: None (if required high current diode in series with the input). Length: 4.6cm Wideth: 2.3cm Net Weight: 15g Package includes: 1xLED Driver Adjustable Lithiumion Batteries Charging Module