The offer of receiving a free pair of Black QuietComfort Earbuds with the purchase of an A30 or ProFlight 2 Aviation Headset is valid only on purchases made between 19 July and 30 August, or while stock lasts. This offer may not be combined with any other offers or applied to previous purchases. In the event of a product being returned, any free product must also be returned before we can refund your purchase.