Make sure that your headphones are turned off. Hold down the power button for 4-5 seconds. The LED indicator will turn blue (on) and then fade out. Continue to hold the button until the blue light begins to blink on and off. You have now placed the headphone in pairing mode and will be able to find them on your mobile phone/tablet/laptop.
Mythro Air - moshi.com/mythro-air
Vortex Air - moshi.com/vortex-air
Avanti Air - moshi.com/avanti-air