Features Open Circuit Protection: Inherent LED open circuit protection to maintain over temperature drop current function, adjustable constant LED current, up to 97% efficiency. Practical And Convenient: 6-50V 1-3A step-down high-brightness LED driver, with 5000:1 dimming function, with high-end current detection function, easy to use in real life. High output power: Support 72W (36V/2A) maximum output power, LED driver with switching frequency up to 1MHz. Brightness Control: Single pin on/off and brightness control can be done by DC voltage or PWM. Excellent After-sales Service: We provide you with high-quality after-sales service. If you have any questions, please feel free to contact us, and we will deal with it for you as soon as possible. Specification: Item Type: LED Driver Module Pattern 1: H 1A 8-50V / H 2A 8-36V / H 3A 8-16V / L 1A 6-16V / L 2A 6-16V / L 3A 6-16V Pattern 2: With Terminal / Without Terminal (optional) Working Voltage: L-type DC 6-16V, H-type DC 8-50V (perfect for 6V / 9V / 12V / 18V / 24V / 36V / 48V LED driver) Output Current: 1A / 2A / 3A By Changing for RCS Resistance,Maximum Current: 4A Maximum Output Power: 72W (36V / 2A) Current Regulation: 1 to adjustable resistance; 2 via PWM control Switching Frequency: Up to 1MHz Current Accuracy: Typical 5% output Intrinsic Open LED Protection: Support High Efficiency: Up to 97% Size: Approx. 45 x 21 x 16mm / 1.77 x 0.83 x 0.63in Weight:  Approx. 11 g / 0.4 oz (without terminals) Approx. 14 g / 0.5 oz (with terminals) Package List: 1 x LED Driver Module Package List 1 x LED Driver Module