Metra 44-UA200 is a universal amplified antenna that can be installed on the inside of a window or any non-metallic surface, eliminating the need to drill holes. It is designed to provide AM/FM performance close to a conventional 31” external antenna, making it ideal for replacing non-functioning or broken power antennas. The antenna is nearly invisible in most applications, allowing it to be mounted high on a vehicle or boat while remaining protected from adverse weather conditions and salt.