Designed specifically to improve the performance of outdoor antennas in low signal strength areas | switchable fm trap reduces interference from fm frequencies | refer to all the relevant documents below before use. | preamplifier for outdoor antennas extends range in low signal strength areas | rca's advanced smartboosttm technology amplifies weak signals to deliver the most channels possible | optimizes performance with separate uhf/vhf amplification | switchable fm trap to prevent interference from fm signals | use in all difficult reception areas. Vhf gain: 16db, uhf gain: 22db, intermodulation: avg>60db | designed and engineered in the usa | ** very important**disclaimer: reception quality and channels received will depend on distance from towers, broadcast power, terrain and other factors. Hence kindly refer the user manual before use. | rca tvpramp1r outdoor antenna preamplifier, designed specifically to improve the performance of outdoor antennas in low signal strength areas. Weight capacity 200 lbs.