DC-DC Reverse Converter 6V-32V to 3V-12V Adjustable Power Supply 24V to 12V 5V 3V USB Voltage Regulator Fast Charging Input Voltage Range: 6V-32V; Output Voltage: 5V Standard Setting; Automatically adjusted from 3-12V after fast charging. [Backup Protection] input overvoltage, slave voltage protection, input overcurrent, output overcurrent and short circuit, machine over-temperature. Supports multiple devices: mobile phone solar panel charging, car charger charging, DVR power supply, home power conversion, smart plug change, fast charging adapter. Supports multiple fast charging protocols: for DCP, for BC1.2, for i-phone, for s-amsung, for Qualcomm QC2.0 and QC3.0, MTK PE1.1/PE2.0, for AFC hua-wei, FCP/SCP, for Spreadtrum SFCP[Note] when using the card, please do not exceed the specified input voltage. Material: PlasticColor: BlackPackage Contents:5 x DC-DC Rear USB Charging ModulesOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.