Our Control X Wireless speaker has two different patterns for switching on, when using either battery or AC power. When using battery, turning on one speaker in either stereo mode or association mode (4 speakers connected), all will turn on simultaneously, no matter which is primary or secondary. When connected to AC power, switch on the primary speaker in stereo or associated mode, and the secondary speakers will follow. If you have associated speakers stereo or 4 speakers connected, then you have to press primary speaker's power button for more than 2 seconds, then the primary will send signal to secondaries, and they will wake up. It takes approx. 30-60 seconds before all are switched on. If your press it too short (less than 2 seconds), the primary speaker will not "pair" the secondary speakers together. Switch off the primary and start over again.