LED Constant Voltage Dimmer Board Control Module, B 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, 0-100% 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 - 100% 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 Best 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 Source Must Be String-Limited By Resistors) Input 24V, With 6-7 Strings Of LEDS (The Light Source Must Be In Series With Resistors For Current Limiting) Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Type:B:Square Colour:As Shown Material:PCB+Metal Package Contents: 1 * LED Constant Voltage Dimmer Control Module 2 * Screw Installation Accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.