Zulu Evo — 720 Label
There is a persistent myth on pilot forums that the indicates a "firmware updateable" headset. This is false. Unlike the PFX (which had a DSP chip), the Evo 720 is an analog ANR headset. There is no USB port. You cannot flash it. The "720" is purely hardware configuration. Do not fall for a seller claiming "Firmware upgraded to 720 specs."
Look closely at the . It is attached to the headband, but the brain of the operation is the K-Clip . This is the rectangular control module that houses the batteries and volume knobs. zulu evo 720 label