The Obihai Obi202 VOIP ATA Telephone Adapter is a device that allows you to make and receive phone calls over the internet. It has dual USB connectors and supports 2 lines. The adapter is black in color and comes with an AC adapter. It has features such as call return, call waiting, and call transfer. The interface is Ethernet (RJ-45). The product is compatible Fax. It is designed for use in Computers/Tablets & Networking, Home Networking & Connectivity, and VoIP Phone Adapters. The product does not contain any chemicals or materials specified in the California Prop 65 list.