Check the max current your device will draw. It should be equal to or less than 3A, such as 0.5A, 1A, 1.5A, 2A, 2.5A, 3A. It should be equal to or less than 3A, such as 1A, 1.5A, 2A, 2.5A, 3A. It should be 3.5V~24V DC, and must not fall below 3.5V DC or exceed 24V DC.