Product Features: Input voltage range: 6V-32V Output voltage: default 5V, automatic adjustment between 3-12V after fast charge Output power: maximum 24W (5V/3.4A, 9V/2.5A, 12V/2A, etc.) Output voltage wired compensation Conversion efficiency: 90%-97% Supports multiple fast charging protocols Input overvoltage, undervoltage protection Input over-current protection Output overcurrent and short circuit protection Over temperature protection Support fast charging protocol BC1.2, iPhone, Samsung agreement Qualcomm QC2.0 and 3.0 MTK PE1.1/PE2.0 Huawei 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 Product Size: 34*17*9.5mm (Excluding 1mm of USB female seat protrusion) Package Include: 2pcs DC-DC Buck USB charging module.