M12万用插头 P10专用插头
Plantronics M12 Vista Universal Amplifier 万用插头 
- Easy One-Button Selection of Headset or Handset
- Call Clarity technology
- Adapts almost all telephones
- SoundGuard Plus
- 适用于各类型电话系统
Plantronics P10 Plug - Prand Adapter 特式插头
- Use this adapter with operatar consoles, PBX and most ACD`s. With
valume control.
- 总台，话务台适用