Fangrui Product Details 1. 5-30v Step-down Hb Led Driver Module Working Voltage: Dc 3.5-30v( For 3.7v 5v 6v 9v 12v 18v 24v Led Driver) Output Current: 0-910ma;by Changing The Rcs Resistance, The Maximum Drive Current Can Be Changed Maximum Output Power: 20w Current Regulation: Through Pwm Control Single Pin On/off And Brightness Control Using Pwm Simple Low Parts Count Wide Input Voltage Range: 3.5v To 30v Up To 910ma Output Current Pwm Dimming Output Current Accuracy. Up To 1mhz Switching Frequency Typical Output Current Accuracy Inherent Open-circuit Led Protection High Efficiency (up To ) Adjustable Constant Led Current High-side Current Sense Hysteretic Control: No Compensation Soft Over Temperature Protection Typical Application: Low Voltage Halogen Leds Automotive Lighting Led Back-up Lighting Illuminated Signs Car Led Lights Stage Lights The Printing/appearance From Batch To Batch, But It Not Affect The Use; The Actual Product May Have Color Difference Due To Different Light Or Display. Colour