Very similar to the Eartec Office 308 model, this headset includes optional noise cancellation to protect callers from distraction. It’s a great choice for noisy business environments, offering the same comfort and durability of the previous model Accessories Options: – Foam or protein leatherette ear cushion is optional – Intercom connecter options:4P4C (RJ9)plug, 2.5mm ,3.5mm stereo plug or USB2.0 plug. – M-Volume Controller (with Mic Mute) is optional. – QD (Quick Disconnect) function is optional – Two Standard QD plugs can be chose Structure Features: – Comfortable ear cushions, lightweight headband and flexible cord design, as well as adjustable microphone boom ,work to enhance every-talk’s good audio quality and all-day’s wearing comfort – 330°rotatable MIC pole. – 60mm adjustable T-Pad headband 180° rotatable joint of speaker and headband – CE, FCC certificated.