[Convenient Length] This 108cm ear-hanging headphone provides flexibility and comfort during use. [Compatibility] Compatible with Vnetphone V6/V4,compatible with EJEAS V6/V4/FBIM/Q7 intercom devices, it also features a 3.5mm interface for use with smartphones and mp3 players. [Versatile Use] Suitable for football referees, arbitrators, skiers, and off-road enthusiasts. [Clear Sound with Noise Reduction] These headphones offer clear sound and noise reduction, ensuring referees can get real-time updates during matches, even in noisy environments. [Secure and Comfortable] With an ergonomic ear-hook design, these headphones provide a secure and comfortable fit. Cable Length Approx. 108cm Interface 3.5mm Compatibility As Description shown.