1.The new version add the 3.3V/12V power LED, It can directly show the PSU work status. 2.Use this card to turn on and off the two power supplies with low power at the same time, thereby increasing the power of the power supply.Product name: 4PIN ATX power synchronizer Interface: 24PIN+4PIN power interface size:69x30mm Material:ABS colour:green3.The main power supply's 4PIN Male is connected with the PSU's 4Pin Female. And the secondary power supply's 24PIN Male is connected with the PSU's 24Pin female. 4.EASY SET-UP with a 4-pin MOLEX main power connector and a 24-pin ATX connector from the new source.