It's actually, Y+Power - which is how the manual indicates to start up the controller when you use a iPhone - hold down the Y and push power. I think X+Power for an Android phone. It's just a reminder for me. Note: the 2nd blue light (on the controller) comes on / flashes for an IPhone and the 1st blue light (on the controller) blinks for an Android phone. Unsure what the difference is, but I want to make sure the 2nd blue light on the controller is flashing when my iPhone links up. Just want the manual indicates.