ENGENIUS SN-ULTRA-EPM Durafon non-UHF Headset Microphone only The SN-ULTRA-EPM microphone plugs into the handset and is designed to clip onto clothing to remain secure for good voice transmission Modular headset microphone for use with the DuraFon 1X, DuraWalkie 1X, DuraFon PRO, DuraWalkie, DuraFon SIP, FreeStyl 1 and FreeStyl 2 handsets Headset will not fit the DuraFon UHF handset Features: Amplifiers : Yes Headset Adapters : Yes Country of Origin : Taiwan (provided by manufacturer, not verified)