The AO-FIELDSET is designed to protect your field audio equipment during transport (free hard case), and hit the ground recording with the lastest AO-SILENT field recording case (recorder / mixer and wireless mics) and the CA-HP professional headphone case (waist belt included).  
 
Purchase the AO-SILENT and CA-HP together in this bundle at a discounted price and recieve a FREE PB-4100E hard case that fits the AO-SILENT and recorder/mixer.  The headphone case can be used to protect your headphones during transport or can be worn on the waist belt for convenient use when recording.