3.5-30V Step-down HB LED Driver Module Working voltage: DC 3.5-30V(Perfect for 3.7V 5V 6V 9V 12V 18V 24V LED Driver) Output Current: 0-330MA;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 330MA output current PWM dimming 3% output current accuracy. Up to 1MHz switching frequency Typical 3% output current accuracy Inherent open-circuit LED protection High efficiency (up to 94%) Adjustable Constant LED Current High-Side Current Sense Hysteretic Control: No Compensation Soft Over Temperature Protection Typical Application: Low voltage halogen replacement 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:White Material:PCB Package Contents: 1 x Step-down HB LED Driver 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 the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.