Aqualung Airsource QD, CompleteAirsource QD Complete Integrated Backup Air and Buoyancy Control The Airsource QD Complete is designed to combine a reliable backup breathing source with intuitive buoyancy control in one streamlined unit. By integrating an alternate air source directly into the BCD inflator, it helps reduce hose clutter while ensuring immediate access to backup air when it matters most. Ideal for recreational divers who value simplicity and safety, the Airsource QD