This product is either discontinued or we cannot get that from suppliers.
Poly Plantronics 83356-02 Savi Spare Convertible Wh500 Headset, Single Earpiece, Bluetooth Headset, Headset, DECT technology, Wireless Connectivity, Lightweight and flexible design, Headset conferencing.
Also referred to as WH500 which comes with a portable and lightweight design and also has a best class PC sound. The headset includes a replacement battery, Charging cradle, Headband, neckband and Fit Kit which contains of 4 earbuds and 3 earhooks.