PTT Push To Talk ButtonReferee Headset with (PTT) Push-To-Talk Button. Allows 4th Official to remain in listening mode without disturbing the referee crew until voice cummunication is needed. ^^ 3.5 mm JackThe type of headphone jack port is a round 3.5 mm, the cord length is 3.6 feet, which is more widely used. Only for referee radios like V4 Plus FBIM. Not compatible with mobile phones. ^^ Earphone for Referee RadioSingle-ear headphone accessory with hard microphone. This referee headset is specially designed for our V4 Plus, V6Pro, FBIM soccer football referee intercoms.
^^ Clear and Stable SoundWith improved noise reduction technology, even in a noisy stadium, high-fidelity speakers can also make the sound you hear clear and stable. ^^ Light WeightLeight weight to carry, referee headset ear hook, easy to use, widely used in soccer referee communication. You'll get 1 earphone with the PTT button.