The SIGNAL PRO Wired PTT Headset includes a replaceable audio tube and earpiece for comfortable, all-day use. The SIGNAL PRO’s 2-Wire design allows for theheadset cords to be clipped over or under clothes or auniform, while on the job.Klein custom-designed the SIGNAL PRO headset to reliablyconnect to Sonim’s SecureAudio 3.5mm Connector. Thisallows the SIGNAL PRO headset connector to twist intoplace into the handset. The SIGNAL PRO headset has alarge, easy-to-access PTT button, compatible with heavywork gloves.