AfterShokz Blog – November 15, 2017
Awe, yeah! You just received your new Trekz Air! You’ve opened the box. You’ve charged it until the LED light turns blue. Now what? Press and hold the power button on Trekz Air for 5-7 seconds. (The power button on Trekz Air is the volume+ button. It is not the multifunction button located on the side transducer.) Audrey will say “Welcome to Trekz Air,” indicating the headphones are on. If you want to turn the headphones off, press and hold the same button. Audrey will say “Power off.” For more assistance in turning your headphones on or off, email hello@aftershokz.com.
Source: How to Power On Your Trekz Air