The Grandstream VoIP Phone Adapter HT801 is a sleek black adapter designed for connecting a single VoIP phone line to your home network. With its micro USB connector and Ethernet interface, this adapter allows you to easily convert your traditional phone system to a VoIP system for improved functionality and cost savings. The Grandstream brand ensures quality and reliability, making this adapter a great. choice for enhancing your home networking and connectivity setup.all units have been fully tested, vetted, updated, and reset. PLEASE NOTE, UNITS DO NOT COME WITH A POWER ADAPTER.