Working Voltage: DC 2.8-6V (for 3V 3.3V 3.7V 4.5V 5V 6V LED driver). Output Current: 30-1500MA High Output Power: 9W Can drive 1-16pcs 2.8-6V LEDs (large current does not exceed 1.) Current Regulation: 1 via adjustable resistor; 2 via PWM signal control Chip temperature regulation LED overcurrent protection working temperature range Color: as shown Material: PCB Package Contents: 10 x Constant Current Adjustable Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.