Features Using sophisticated manufacturing technology, the DC step‑down module is not easy to appear false welding. Equipped with USB interface, can be directly connected and used, this DC step‑down module is easy to operate. Suitable for converting solar panels to mobile phone charging, car charging, driving recorder power supply, etc. The output voltage is 5V by default, and it will be automatically adjusted between 3‑12V after fast charge is triggered. Support multiple fast charge protocols, input over‑voltage, under‑voltage protection, input over‑current protection, output over‑current short‑circuit protection. Specification: Item Type: Step‑Down Module Material: Printed Circuit Board Input Voltage Range: DC 6V-32V Output Voltage: Default 5V, Automatically Adjust Between 3-12VAfter Triggering Fast Charge Output Power: Maximum 24W Conversion Efficiency: 90%-97% Purpose: Reduce Voltage  Applicable Scenarios: Solar Panel Transfer to Mobile Phone Charging, Car Charging, Driving Recorder Power Supply, Household Power Supply, etc. Package List: 4 x Step‑Down Modules Package List 4 x Step‑Down Modules