Poly (Plantronics) EncorePro 310 Mono QD (quick disconnect) is a single ear over-the-head headset with foam ear cushions. Designed for call center or office workers.  EncorePro 310 QD is an entry level, affordable professional office headset.  It has noise canceling microphone with HD audio ensures more focus and with fewer missed words. Acoustic protection and voice optimization. So your employees can perform at their best throughout their shiftsPlus acoustic protection and voice optimization. So they can perform at their best throughout their shifts

Key Features:

• Over-the-headset monouaral style 
• Soft foam ear cushions (replaceable)
• Flexible microphone boom
• Dynamic mute alert, lets you know when you talk and muted
• Acoustic protection against loud noise spike from the phone line

Old Poly part # 214572-01

New HP part # 77T43AA

Important Note: This headset requires the Plantronics M22 Vista amplifier or bottom cable between the headset and the telephone. call 877-999-3838 for assistance.