CURL 1-Wire PTT Earpiece (3.5mm connector) -POC Audio Accessory Solution Over-Ear for hygeine & all-day comfort. Popular design for frontline and shift workers, with an earpiece that can be cleaned and shared. Swivels for Left or Right Ear. Noise Reduction Knowles Microphone. Battery Enhanced Audio. Front Facing PTT Button. Kevlar Reinforced Cables. Designed & Engineered in the USA.