The King Jack HDTV Directional Antenna with Mount & Signal Meter is the latest in King's next generation of over-the-air antennas. Built-in King SureLock Digital TV Signal Finder simplifies antenna aiming and takes the guesswork out of finding local TV channels. With a better signal and a new high-tech yet simple design, the King Jack provides better performance than you'd expect from such a compact over-the-air TV antenna. King Jack is designed for long-range signal acquisition, ease of use, strong performance and durability, making it the perfect choice for the demands of an RV or travel trailer. Position this directional antenna using the included interior knob. King Jack has a full 360 degrees of rotation, allowing you to easily find TV towers, so you can enjoy free digital HDTV wherever life takes you. Features include:• Built-in King SureLock signal finder for simple signal acquisition• Long-range signal acquisition (get more channels)• Amplified, ultra-high gain antenna• Upgraded technology enhances UHF signal reception while still receiving VHF broadcast channels• Broader reception coverage quickly locates strongest signal and maximizes reception• Simple, fast antenna pointing with 360-degree rotation• Easy installation and replacement of your old antenna• Compact, aerodynamic design maximizes wind resistance and is up to 70 percent smaller than traditional RV antennasThe wall mount power injector has inputs for antenna and cable plus outputs for two TVs. Includes interior rotation knob with signal meter, wall mount power injector, shafts for varying roof thickness and owner's manual. 12-volt. Easy installation/replacement of your old antenna Simple, fast antenna pointing Upgraded technology enhances UHF signal reception | KING Jack HDTV Directional Antenna & Signal Meter, Black