PRO LONG BOOM MOTOROLA Flexible boom allows for personlized fit. Soft plastic ear frame stabilizes unit on the ear. Air cushion ring encases 11mm earbud for enhanced comfort. Enameled, shielded and jacketed wiring reinforced at all stress points. No Click In-line PTT; many models provide additional PTT on the accessory connector. Tubular reinforcement at point of entry into the accessory connector to prevent shorts. Gold plated plug allows for better electrical connection In-line PTT provides additional 2.5mm jack for use with optional finger PTT.