Feature:1. 1.Referee monaural headset earhook, simple and lightweight,3.5 interface,Widely using in football referees2. 2.This headset is specially designed for referees of football and handball.3. 3.The referee headset is welcomed by football fans and professional referees, removable earhook, monaural earphone, Hi-Fi peaker, clear and loud sound, helps you to make the right judgement on the football match!4. 4.3.5mm audio jack is widedly used, when the football match finished, plug the headset into your mobile phone to enjoy the music is a good choice too.5. 5.It is also loved by handball referees too.Specification:Feature:1.Referee monaural headset earhook, simple and lightweight,3.5 interface,Widely using in football referees.2.This headset is specially designed for referees of football and handball.3.The referee headset is welcomed by football fans and professional referees, removable earhook, monaural earphone, Hi-Fi peaker, clear and loud sound, helps you to make the right judgement on the football match!4.3.5mm audio jack is widedly used, when the football match finished, plug the headset into your mobile phone to enjoy the music is a good choice too.5.It is also loved by handball referees too.Specifications:Plug Type:3.5mm Work For:Vnetphone V4/Vnetphone V4C/Vnetphone V6 V6C/FBIMSize: 10*10*6.5cmPackage weight:22gPackage1x headphone ( Not with any Intercom Receiver) Package List:1x headphone ( Not with any Intercom Receiver)