QC3.0 QC2.0 USB DC-DC Buck Converter Charging Step Down Module 6-32V 9V 12V 24V to Fast Quick Charger Circuit Board 3V 5V 12V your experience to unparalleled inspiration. Output voltage: The default is 5V. After the fast charge is triggered, it is automatically adjusted between 3 and 12V. Output Power. 24W (5V, 3.4A, 9V, 2.5A, 12V, 2A, etc.) Output voltage wired compensation Conversion efficiency: 90% to 97% Supports multiple fast charging protocols Input over voltage, undervoltage protection Input over-current protection Output overcurrent and short circuit protection Over temperature protection Support fast charging protocol for BC1.2, iPhone, Samsung agreement for Qualcomm QC2.O and QC3.O MTKPEI.1/PE2.O Fast Charge Protocol FCP Star Fast Charge Protocol AFC Spreadtrum Fast Charge Agreement SFCP Applications Solar panel to mobile phone charging Car charging retrofit Driving recorder power supply Home power conversion color: black Material:Metal + PC