APEX SM 620 Amplified HDTV Indoor Antenna with Smart Technology Multi-Directiona Connects to a standard RF input or Smart antenna interface Automatically locates and locks in optimal DTV signal from any direction Advanced technology conveniently self adjusts without physical movement Built-in noise amplifier with automatic gain control Connects to a standard RF input or Smart antenna interface. Hangs on the wall, lays flat, or stands in its cradle