When selecting a power supply, firstly determine your system’s power requirements of voltage, current, DC cable length,DC connector, AC plug. Then you should determine to to use wall mounted power adapter type, interchangeable plug type or desktop type. If your products are sell in multiple regions, interchangeable plug power adapter with multi-blade wall plugs and desktop power adapter will be a great choice. If you only sell in specific area, wall mounted power adapters will be more suitable as its size and weight is small and cost will be lower.