TELCO Teleplus X239U Antenna has been designed to be mounted through the roof on motorhomes or caravans. The antenna was designed for reception in mind and increasing performance over previous versions. The Teleplus TV Aerial can receive both Horizontal and Vertical polarity broadcasts and includes a low noise amplifier with adjustable gain and can be used on either 12 or 230 volts. Includes a 39cm mast. 47cm L x 37cm W x 4cm D. The Teleco Teleplus TV Aerial has an impressive 38dB Gain.