You are buying (5) Genuine Plantronics EU version Pin Adapter P/N 81903-06 for Plantronics Bluetooth 5V and Wireless Headset 9V electronics power supplies. Plantronics UEU version Pin Adapter P/N 81903-06 fits Plantronics Bluetooth Headset 5V and CS & Savi Wireless 9V electronic power supplies.
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