HEADSET ONLY - RADIOS SOLD SEPARATELY Radio communication is the most reliable way for workers to communicate in a noisy tree work environment. The SwatCOM heavy-duty PTT (Press-to-Talk) passive headsets are compatible with a choice of industrial-grade 2-pin radios, including iCOM, GME, and Hytera TC-610. The PTT button is mounted at the back of the left cup and is secured with a waterproof surround. Manufactured in Sweden, the SwatCOM AK5850 offers exceptional hearing protection with a signal-to-noise ratio (SNR) of 29 dB. It also has a noise-cancelling microphone that filters out background noise for clear voice transmission. The unit is built to meet the demands of extreme environments. Radios are sold separately. The SwatCOM AK5850 is a wired unit, not a Bluetooth unit.