Working voltage: DC 2.8-6V (for 3V 3.3V 3.7V 4.5V 5V 6V LED driver)Output current: 30-1500MAHigh output power: 9WCan drive 1-16 2.8-6V LEDs (large current does not exceed 1.)Current regulation: 1 via adjustable resistor; 2 via PWM signal controlDimensions: 18mm x 10.3mm x 2.8mmPackage included：1 pce of PWM control board