Features [EXCELLENT PCB] Adopt FR‑4 1.6mm thick PCB design, with optimized layout, back heat dissipation, has low full load operating temperature [4 WAY DESIGN] 4 way fast charging module, 12V24V to QC3.0, supports QC 3.0 fast charging protocol, and can be charged at the same time. [USB CHARGING] USB interface design, can charge mobile phones, supports a variety of output fast charging protocols, with good compatibility. [WITH BUCK CHIP] Built in synchronous switching buck converter chip, with 220Khz switching frequency, voltage conversion efficiency up to 97%. [SAFE OPERATION] Standby current is 0.013A, the module has output voltage compensation function, with multiple protection and high reliability. Specification: Item Type: Fast Charging Module Built in synchronous switching buck converter chip Input Voltage Range: 4.5V-32V (Buck module, the input voltage must be higher than the output voltage) Output Voltage Range: 3V-12V, automatically adjusted according to the fast charging protocol Output Power: 24W maximum (4V at 3.6A, 5V at 3.4A, 9V at 2.5A, 12V at 2A, etc.) Output voltage wired compensation Output has CV/CC characteristics (output current is less than the set value, output CV mode; output current is greater than the set value, output CC mode) Conversion Efficiency: Up to 97% Soft Start Function: Yes Switching Frequency: 220Khz Output Fast Charge: 1. Support for BC1.2, for iOS, for Samsung protocol 2. Support for Qualcomm QC2.0 QC3.0 3. Support for MTK PE1.1/PE2.0 4. Support for Huawei Fast charging Protocol FCP 5. Support for Samsung fast charging protocol AFC 6. Support for Spreadtrum Fast charging Protocol SFCP Multiple Protection, High Reliability: 1. Output overcurrent, input overvoltage, input undervoltage, output short circuit protection 2. Over temperature protection of the whole machine 3. ESD 4KV, DC withstand voltage 48V Package List:1 x Fast Charging Module Note:This module is a 4 way buck type fast charging module, please use 12V‑30V DC power supply, the positive and negative poles cannot be reversed. Package List 1 x Fast Charging Module