Key benefits Three configurable output schemes for flexible charging: 5V up to 3.4A, 9V up to 2.5A, or 12V up to 2A. This supports devices with different fast charging requirements and helps maximize charging efficiency. Wide fast charging protocol support: DCP BC1.2, QC 2.0/3.0, SCP, Spreadtrum SFCP, and other fast charging standards. Broad compatibility for a variety of devices. Dual USB charging capability: two USB ports allow charging two devices simultaneously without compromise. Comprehensive protection system: input overvoltage and undervoltage protection; output overcurrent, overvoltage, undervoltage, and short circuit protection; reverse connection protection; and chip internal temperature protection. Realtime voltage monitoring for safety: monitors battery voltage with a DC range of 630V. If the voltage is lower than 12V at startup, the battery should be replaced promptly. Specifications and features Output: three schemes: 5V at up to 3.4A, 9V at up to 2.5A, and 12V at up to 2A. Fast charging protocols supported include DCP BC1.2, QC 2.0/3.0, SCP, Spreadtrum SFCP, and other fast charging standards. Dual USB ports enable simultaneous charging of two devices. Protection functions cover input and output safety: overvoltage, undervoltage, overcurrent, short circuit, reverse connection, and temperature monitoring. Realtime voltage monitoring with a measurement range of DC 630V; note about startup voltage: if the vehicle voltage is below 12V at startup, the battery. Compatibility and performance Designed for use in vehicles to provide reliable, fast charging for devices that support QC, SCP, SFCP, and other fast charging standards. Provides multiple protection layers to help prevent damage to connected devices and the vehicle electrical system. Realtime voltage monitoring helps identify battery health issues and promotes safe operation during driving and startup. Use scenarios Scenario 1: On a long road trip, charge two devices at the same time using fast charging protocols (for devices that support QC, SCP, SFCP, etc.), ensuring efficient and convenient power on the go. Scenario 2: Everyday commuting with passengers who use devices requiring fast charging; the dual USB ports enable charging without choosing which device to power first. Scenario 3: Realtime voltage monitoring helps assess vehicle battery health. If at startup the voltage is below 12V, consider replacing the vehicle battery to avoid startup issues.