Mairdi MRD-308S

Features : 

• Single earpiece with superb clear sound 
• Noise cancellation microphone protects callers from surrounding distraction
• Foam or protein leatherette ear cushion 
• Multiple connecter choices: RJ9 plug, 2.5mm, 3.5mm stereo plug, USB2.0 plug
• M-volume controller (with Mic Mute) is optional
• Two kinds of standard QD plugs: G-QD or P-QD 
• 330°rotatable microphone arm
• 180°rotatable joint of speaker and headband
• 60mm adjustable pliable steel headband
• Quick disconnect for leaving desk without taking headset off