NVolo Polyvalent Headset means that you can attach two radios, at the same time, to your headset. You may Tx and Rx using your 2 meter amateur (VHF-UHF) radio on the left earcup AND your aviation airband (UHF) radio on the right earcup, or vicerversa. This configuration can be switched internally ... 2 meter radio on the right earcup and aviation radio on the left earcup. Both earcups have INDEPENDENT volume control knobs and PTTs. Polyvalent headsets are also available with or without SIDETONE.
Sidetone is a function which allows you to hear yourself through the headset speakers when opening transmission or just when speaking through the microphone.
They are also available in CARBON (glossy and matte finishing) and PAINTED (matte black, matte white and matte military green).
Price includes: Polyvalent Headset (2 meter amateur VHF radio on the left earcup AND aviation UHF airband radio on the right earcup) with independent PTTs and volume control knobs on each earcup, 2 meter radio pigtail (cable), aviation radio pigtail (cable), bluetooth and a 2 YEAR WARRANTY!