Klein COMFIT Wired PTT Headset with noise cancelling boom microphone, includes an ultra-lightweight, secure and replaceable earpiece, for comfortable, all day use. The COMFIT provides loud and clear audio, with whisper clarity. Klein custom designed the COMFIT headset to reliably connect to Sonim's SecureAudio Connector on the XP5s and XP8 handsets. This allows the COMFIT headset connector to screw into the handsets. The COMFIT headset has a large, easy to access PTT button, compatible with heavy work gloves.