HEADSET ONLY - RADIOS SOLD SEPARATELY Radio communication has proved to be the most reliable way for workers to communicate in a noisy tree work environment. The SwatCOM heavy duty PTT (Press-to-talk) passive headsets work in conjunction with a choice of industrial-grade 2-pin radios; iCOM, GME or Hytera TC-610. The PTT button is mounted at the back of the left cup and secured with a waterproof surround. Manufactured in Sweden, the SwatCOM AK5850 features outstanding hearing protection (SNR 29dB) and a noise-cancelling microphone to filter out background noise for clear voice transmission. Built to meet the demands of extreme environments. Radios sold separately. SwatCOM AK5850 is a 'wired' unit, not Bluetooth.