zTEA casque d'écoute Hi-Threat Tier 1  /zTEA Hi-Threat Tier 1 Headset The zTEA Hi-Threat Tier 1 Headset is a double-earpiece communications interface with output sound in both ear and a microphone on an adjustable boom. Offering well padded earpieces on both sides, the headset also has additional booster microphones on...