iFi ZEN Air Blue Bluetooth DACLet the Air in. Enjoy unbeatable HD Bluetooth streaming from your phone, tablet or computer. The ZEN Air Blue is a high quality Bluetooth audio receiver. It converts Bluetooth audio streams from smartphones, computers or tablets into an audio stream suitable for headphones, amplifiers and active speakers (speakers that run on their own DC power). Hear the difference The ZEN Air Blue will give you the maximum sound quality from your device your