Referee Essentials: In soccer games where referee radios are commonplace, hygiene is a top concern. Keep your worries at bay by having spare headsets on hand. They also serve as a great backup in case of accidental damage. Referee Earpiece: This single-ear headphone accessory features a rugged microphone and is purpose-built for our V4 Plus, V6Pro, and FBIM soccer football referee intercom systems. Crystal-Clear Audio: Our advanced noise reduction technology ensures clear and stable sound, even amidst the roar of a crowded stadium. Enjoy high-fidelity audio every time. Universal 3.5mm Jack: Sporting a standard 3.5mm round headphone jack and a generous 3.6-foot cord length, it's compatible with a wide range of devices, including mobile phones and MP3 players with a 3.5mm connector. Feather-Light Design: Crafted for comfort, these referee headset earpieces are feather-light and feature easy-to-use ear hooks. They are a must-have for soccer referee communications. Your purchase includes 2 left-ear earpiece. MIMIRACLE 2 Pack Referee Headset, Left-Ear In Ear HiFi Earphone Earpiece Fit for V6 V4 FBIM Football Soccer Coach Intercom