Custom Case for Waza-Air and Waza-Air Bass The compact and robust CB-WZ-AIR is the perfect partner for transporting and storing your Waza-Air or Waza-Air Bass Wireless Personal Amplification System. The semi-rigid custom case made of EVA plastic has a durable polyester cover and high-density foam inserts with precise cut-outs to safely store both the headphones, WL-T transmitter and the USB charging cable.