Features: This USB power supply module efficiently steps down 9V-36V input to stable 5V/3A output, ideal for solar systems and automotive applications with its wide voltages compatibility. Engineered with advanced bucking circuitry and PCB mounted components, it features overload/short circuit/thermal protections for reliability operate across demanding environments. Perfect for solar energy enthusiasts, owners, and electronics DIYers needing robust voltages regulation. Seamlessly integrate with solar panels to charging phones in cabins or stabilize car battery voltages for dashcams during road trips. Its compact design withstands vibrations prone environments while maintaining consistent 3A output for simultaneous charging of multiple USB devices. Specifications: Component: PCB + Electronic Components Size:Approx.50x35mm/1.96x1.38inch input voltages:6V-23V input power:6W-50W Efficiency:92% (most) Switching frequency:150KHZ Working temperature:-40°C~+85°C Applicable products: Suitable for power conversion between solar power panels and mobile devices Package Includes: 2pc USB Power Supply Module note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.