CRYSTAL 12V 24V to for QC3.0 DC?DC Set Down Double USB Fast Charging Buck Module7.77Buy!£Joom UKDelivery: to United Kingdom ReportFeatures: 1. Made of high quality electronic component, durable to use. 2. Small body and great performance. 3. Many protection, input undervoltage protection, input overcurrent protection, output ove more→rcurrent, short circuit protection and whole machine over temperature protection. 4. The conversion efficiency can be about 9097percent . 5. Used in solar panel transfer mobile phone charging, DIY car charger, car driving recorder power supply, DIY home mobile phone fast charger. Specification: Condition: Brand New Input Voltage: DC632V Output Voltage: 5V Output Power: 18W * 2 Conversion Efficiency: About 9097percent Support Fast Charging Protocol: For BC1.2, For Apple, For Samsung, For Qualcomm …