1. Noise cancelling microphone with superior audio clarity. 2. Newly designed structure with light weight and durability. 3. Stylish appearance design. 4. Big ear pad and soft ear cushion ensures whole-day wearing comfort. 5. Ratchet style microphone boom, easy to be adjusted. 6. Soft designed T-Pad for convenient wearing. 7. Click-stop headband for superior comfort. 8. Anti acoustic shock circuit. Marks: 1. 3 different ear cushions are available: Foam, Leatherette, Protein Leatherette. 2. Multiple connecter choices: RJ9 plug, 2.5mm, 3.5mm stereo plug, USB2.0 plug. 3. M-volume controller(with Mic Mute) is optional. 4. G-QD or P-QD 1pc per box, 50pcs per carton