Input port: DC socket and terminal block, each makes the module work normally, and it can also be connected at the same time; Output port: USB and terminal block, can output power at the same time. High-efficiency voltage transformation: The module adopts new technology synchronous rectification, which obviously improves the conversion efficiency and expands the working voltage and current. Mini portable: Suitable for narrow installation spaces and small enclosures. Application: As a USB 5V step-down converter, DIY mobile phone charger, modified car charger, power supply for 4 b. Application areas: household appliances Material:PC+metal colour:Blue Contents: 2 x Converter Module Only the above content, other are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.