【Free 4K HDTV Quality Viewing】This is a high-performance HD outdoor/indoor antenna that achieves a maximum reception distance of 450km. It delivers full 4K 1080p HD to digital-compatible TVs. The improved 4K antenna picture quality is 80% better, allowing you to enjoy clear images and vivid colors, with reduced noise. 【360° Omnidirectional Reception】It can receive radio waves from all 360 degrees. Our smart antenna uses a uniquely developed adaptive enhanced signal amplifier and incorporates a smart IC chip. The Smart IC USB power adapter, with built-in overvoltage protection, is useful if your TV doesn't have a USB output to connect the DTV antenna to power. 【Built-in Booster, No Installation Required】You can install it in places where radio waves are easily received in your home, such as on top of a TV stand, near a window, or against a wall. Because it uses a 5M coaxial cable, it has a higher reception strength than other products, resulting in a clearer output image. Simply plug it in, mount it, and scan for channels. The indoor antenna can be placed on a table or attached to a window. 【Waterproof Specification for Outdoor Use】This compact design, high-performance terrestrial digital antenna, which can be installed indoors and outdoors, has a booster function that allows it to receive TV signals in the frequency band from low-frequency VHF (174-240MHz) to high-frequency UHF (470-862MHz), enabling reception of terrestrial digital broadcasts. In addition, one of the attractive features of this indoor antenna is that you can enjoy terrestrial digital broadcasts without wiring work in places where there is no TV outlet in the room. A 5m long cable is included; extending the antenna outside the window or on the balcony allows for higher sensitivity reception than indoors! 【Antenna Installation Position Guide】The reception sensitivity of radio waves varies depending on the installation location. Distance from the radio tower, surrounding terrain (hills, mountains), and obstructions affect the reception condition. Keep it away from devices that consume large amounts of power. In residential areas, try the following locations, as reception may be affected by nearby buildings: inside the window on the base station side (such as the window sash or in front of the window), and in a high place (such as on top of a dresser or on a curtain rail). Pointing the antenna towards the radio tower/base station will make reception more stable. Before purchasing, please check the available channels and the distance to the nearest transmitting station.