Fangrui Product Details Small Size, 4a High Power, Smooth Dimming, Constant Voltage Dimming Scheme, Output Voltage = Input Voltage Applicable To Dc 3.7v-24v Range, Lithium Battery Can Be Driven, Blue Light Indicator With Switch, 0- Range Adjustable No Flicker, Suitable For Live Broadcast Product Name:dc High Power Led Light Panel Module Working Mode:constant Voltage, With Switch Function Input Voltage:input Dc 6--24v Output Voltage:same As Input Voltage Load Current:within 5a Maximum Load Power:maximum 120w; (voltage X Current = Power) Dimming Range:0 - Stepless Adjustment, No Flicker Tips: 1. This Module Has Input Reverse Connection Protection And No Output Short-circuit Protection. Please Check That The Wiring Is Correct Before Connecting It. Electrical Work. 2. The Input And Output Voltage Difference Of The Module Should Not Be Higher Than 3v To The Dimming Effect And Efficiency. Like: Input 9v, With 2 Strings Of Leds (the Light Source Must Be Resistor-limited) Input 12v, With 3 Strings Of Leds (the Light Sou