The Grandstream HT802 is a two-port analog telephone VOIP adapter that allows users to connect their analog phone to a VOIP system. With USB 2.0 connectors and Ethernet (RJ-45) interface, it offers easy connectivity for home or office use. The sleek black design and call blocker feature make it a practical and efficient choice for those looking to upgrade their phone system. The Grandstream HT802 model is known for its reliability and quality, making it a top choice for businesses and individuals looking to integrate their analog phones with a VOIP system.