Input voltage: 3-4.2V. Output: 3V constant current 5A. Gear settings: four levels of micro-brightness - low brightness - medium brightness - high brightness, double-click to explode. The driver has memory function, battery low voltage protection, anti-reverse connection protection, and temperature control protection. This is the driver board, powered by a single-cell lithium power battery. When the memory is turned off, the gear is automatically set and the temperature control is automatically set (reduce the current when working at 50 degrees, The current slowly picks up at 45 degrees), Manufacturer: Ounfhtrttk