Yeeco Waterproof DC to DC Buck Converter Voltage Regulator 8-22V to 5V 3A/15W Power Adapter 12V to 5V Car Power Supply Volt Regulated Converters Transformer with Micro USB Cable Connector Input voltage: DC 8-22V Output voltage: DC 5V Features: Synchronous rectification power converter Output Current: 3A max Output Power: 15W max Output Interface: MICRO USB Cable Connector Reverse polarity/ short circuit /over current/ temperature protection