This product is either discontinued or we cannot get that from suppliers.
Poly Plantronics 83776-11, Portable Easy To Use, Base connects to USB port in PC, Desk Phone, Compatible With Poly Savi W710, W720, Wireless headset system.
The Poly/Plantronics W710/W720 Base Charging Cradle is an over-the-head charging base that is absolutely suitable for the wireless headset system. It will allow the user to keeps the headset well-secured in its place when charging on the go.