The 12V-5V DC Converter is used for ZWO ASIAIR!
ASIAIR need 5V@2.5A external power supply, it’s micro USB port. Normally, ASIAIR consumes only 500ma current. but peak value would be 2.5A, so please use the power cable come with ASIAIR. other cables may be too thin and cannot provide enough power. You can use 12V-5V DC Converter to connect ASIAIR to the 12V power supply as most Astro device.