The difference between the blue and yellow jack is color and function. The blue jack usually indicates that it supports the fast charge function, which can provide faster charging speed and is suitable for devices with high charging requirements. The yellow jack may indicate an ordinary charging port, which has a slower charging speed and is suitable for general charging needs. Therefore, if you need to charge quickly, choose a blue jack will be more appropriate; If it is just an ordinary charging need, the yellow jack can be met.