DFRobot 5V 3A Dual USB Step Down Buck Converter Module is a small 8~32V converter that supports all 5V main controllers. The module has two USB ports that can output 5V/3A at the same time. With up to 85% conversion, the buck module offers excellent heat dissipation and has reverse connection protection and overload protection. When the current of any output port exceeds 3.5A, the module will switch off.