The Plantronics D100A USB Wireless Adapter Dongle (83550-02) is a black USB DECT adapter specifically designed for the Savi W400/A series. This dongle allows for seamless network connectivity through USB, providing a reliable wireless connection for your devices. Made in Mexico, this model ensures quality and compatibility with your Plantronics headset. With its straightforward setup and sleek design, the Plantronics D100A USB Wireless Adapter Dongle is a convenient and efficient solution for enhancing your home networking and connectivity experience.