Single ear cushion model provides clear sound quality and comfort for all-day use. SES (Sound Enhancement System) tone control switch Lightweight (1.7 oz/49g) Supports SoundGuard Plus and Call Claritytechnologies for superior sound Clear, adjustable voice tube Click-stop headband and turret 10' cable with Quick Disconnect option Headband pad option Adjustable clothing clip Soft ear cushion for all-day comfort H91: Encore Monaural Headset Headset Express Loracomm Plantronics H91 H91N Headsets Encore Monoaural H91: Encore Monaural Headset