Advanced Nipple 3.5mm Listen/Receive Only Covert Acoustic Tube Earpiece Headset for Two Way Radio Speaker Mic Microphone Earpiece: Clear, hypo-allergenic acoustic tube gives a discreet look and provides perfect sound clarity. Uses: Excellent for use in police, military, nightclubs, bars, paintball, security, restaurants, hotels, bouncer, warehouses, and noisy environments. Durability: Flexible and durable high grade Kevlar cable for demanding applications. Connection Type: Universal 3.5mm connector fits two-way radios, radio speaker mics, MP3 players and similar devices